Joel2.jpg

The Invention Exchange is a ritual popularized at the Gizmonic Institute whereby inventors demonstrate a recent invention for each other. As practiced by the participants in the "Mystery Science Theater 3000" experiment, it serves as an informal contest, with each side trying to "win".

Joel Robinson, as an inventor, enjoyed and encouraged the Invention Exchange. Whenever he wasn't able to show off his invention, it seemed to bother him. His replacement, Mike Nelson, on the other hand, was not naturally inclined to such a scientific endeavor and the practice gradually diminished during the first few months of his captivity, until it ceased altogether.

When Kinga Forrester revived the experiment, she also revived the practice, "competing" with Gizmonic employee (and new test subject) Jonah Heston.


List of Invention Exchanges

Joel Robinson Era


Images-1-1.jpeg
Episode Joel's Invention The Mads' Invention
101- The Crawling Eye Electric bagpipes
Images-22.jpeg
Canine antiperspirant
Images-20.jpeg
102-The Robot vs the Aztec Mummy Airbag helmet
102 - The Robot Vs The Aztec Mummy (Shout Vol. 15).mkv snapshot 00.02.14 -2017.03.15 16.52.48-.png
"Chalk Man" record and security system
Images-1.jpeg
103- The Mad Monster Hell-in-a-handbag
Images-12.jpeg
Acetylene-powered thunder lizard
Dinotoy.PNG
104- Women of the Prehistoric Planet Toilet paper in a bottle
ToiletPaperBottle.jpg
Clay and Lars' Flesh Barn
Clay and Lar's Flesh Barn-0.jpg
105- The Corpse Vanishes Chiro-gyro
Images-24.jpeg
Flame throwing flower
FlameFlower.jpg
106- The Crawling Hand Safety saw
SafetySaw.jpg
Limb lengthener
LimbLengthener.jpg
107- Robot Monster Cumber-bubble-bund
CumberBubbleBund.jpg
Methane whoopee cushion
MethaneWhoopieCushion.jpg
108- The Slime People Cartoon eyeglasses
CartoonEyeglasses.jpg
Screaming cotton candy
ScreamingCottonCandy.jpg
109- Project Moon Base Juggling water
JugglingWater.jpg
Insect-a-sketch
InsectASketch.jpg
110- Robot Holocaust Nitro burning funny pipe
NitroBurningFunnyPipe.jpg
Stocking mask of the future
Unknown-4.jpeg
111- Moon Zero Two Teleporting food
TeleportingFood.jpg
Celebrity mouth to mouth toothpaste
CelebrityVomitToothpaste.jpg
112- Untamed Youth Never-light pipe
NeverLightPipe.jpg
Tongue puppets
Images-7-0.jpeg
113- The Black Scorpion Giant party favor
GiantPartyFavor.jpg
Mads have mutated
01.MADS-The Black Scorpion-Screen shot 2011-02-14 at 12.59.00 PM.png
201- Rocketship X-M BGC-19 drum machine
Images-1-0.jpeg
BGC-19 drum machine
FrankDrumMachine.jpg
202- The Side Hackers Joel's pet slinky
PetSlinky.jpg
Dr. F.'s slinky body
SlinkyBody.jpg
203- Jungle Goddess Radio controlled circular saw
RCCircularSaw.jpg
Dr. F.'s head is fused to a sax
SaxHead.jpg
204- Catalina Caper Tickle bazooka
Unknown-6.jpeg
Tank tops
Unknown-5.jpeg
205- Rocket Attack U.S.A. Candy adding machine
Images-9.jpeg
Water-polo foosball
WaterPoloFoosball.jpg
206- The Ring of Terror Pin-bolus
Pin-bolus.jpg
Life-size "Operation" game
Images-7.jpeg
207- Wild Rebels 3D pizza
3DPizza.jpg
Hobby hogs
Images-5.jpeg
208- Lost Continent No time for invention
NoTimeForInvention.jpg
Exercise variations
Images-15.jpeg
209- The Hellcats Sign language translator
Images-21.jpeg
No invention (but they do yell NOOOOO!)
YellNo.jpg
210- King Dinosaur Incredibly stinky sweat socks
StinkySocks.jpg
The pocket scientist
Pocketscience 2.jpg
211- First Spaceship on Venus Junk drawer helper
JunkDrawerHelper.jpg
Invention lost in MADs junk drawer
AbeVigoda.jpg
212- Godzilla vs. Megalon Easy-to-make Halloween costumes
MST3k 212 GvMegalon Invention Exchange- Joel and Bots.jpg
More Halloween costumes
MST3k 212 GvMegalon Invention Exchange- The Mads.jpg
213- Godzilla vs. the Sea Monster Mind controlled guitar
MST3k- The SOL crew's invention exchange for Godzilla Vs. the Sea Monster.jpg
Doggie chew toy guitars
MST3k- The Mad's invention exchange for Godzilla Vs. the Sea Monster.jpg
301- Cave Dwellers Smoking jacket
SmokingJacket.jpg
Robotic arm wrestling
Wpid-screenshot 2015-09-02-23-04-15.png
302- Gamera Endless salad bar
Gamera MST3K Endless Salad Bowl thumb-1.jpg
Bird cage vacuum
Gamera MST3K Invention Exchange thumb.jpg
303- Pod People Monster chord
Pod People Monster Chord.jpg
Public domain "karaoke" machine
MST3k- The Mad's Public Domain Karaoke Machine in POD PEOPLE host segment.jpg
304- Gamera vs Barugon Soda can animation
AnimatedSodaCan.jpg
Disco cumber-bubble-bund
DiscoBubbles.jpg
305- Stranded in Space "Bang"-gun variations
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"Bang"-gun variations
BangHarpoon.jpg
306- Time of the Apes Cellulite phone
MST3k- SOL crew's invention exchange in Time of the Apes.jpg
Miracle growth baby formula
MST3k- The Mads' invention exchange in Time of the Apes.jpg
307- Daddy-O Air freshener mobile
Images-3-0.jpeg
Alien teething nook
Images-8.jpeg
308- Gamera vs Gaos Fax tissue dispenser
FaxTissue.jpg
Self image printers
Self Image Printers.PNG
309- The Amazing Colossal Man Non-permanent tatoos
NonPermTattoo.jpg
A plant that reviews music
A Plant that Reviews Music.jpeg
310- Fugitive Alien Musical chair
MST3k- Joel's Xylophone chair invention exchange in Fugitive Alien.jpg
Eye, ear, nose, and throat dropper
MST3k- Fugitive Alien- The Mad's Invention Exchange.jpg
311- It Conquered the World The "Sony Seaman"
SonySeaman.jpg
Hanged man costumes
HangedMan.jpg
312- Gamera vs Guiron Collapsible trashcan
Gamera vs. Guiron- Collapsible trash and.jpg
Racy rorschachs
RacyRorschachs.jpg
313- Earth vs the Spider CD blow drier
CDBlowDryer.jpg
Cheese phone
Images-18.jpeg
314- Mighty Jack Ear-shaped earmuffs
Ear-Shaped Earmuffs-0.jpg
Formal flippers
Formal Flippers-0.PNG
315- Teenage Cave Man Rainy day epicacs
Images-16.jpeg
Nothing (Mads fight)
Images-14.jpeg
316- Gamera vs Zigra Crow-ka-bob
CrowKaBob.jpg
Three Stooges guns
ThreeStoogesGun.jpg
317- The Saga of the Viking Women and Their Voyage to the Waters of the Great Sea Serpent Literal "Waffle iron"
WaffleIron.jpg
Meat re-animator (for vegetarians)
MeatReanimator.jpg
318- Star Force: Fugitive Alien II The big head
MST3k- Joel's Big Head invention exchange in Star Force- Fugitive Alien II.jpg
Big noses
MST3k- The Mad's nose invention exchange in Star Force- Fugitive Alien II.jpg
319- War of the Colossal Beast Between-meal mortar
BetweenMealMortar.jpg
Breakfast bazooka
BreakfastBazooka.jpg
320- The Unearthly Celebrity products
CelebrityProducts.jpg
Hard to swallow pills
HardSwallowPills.jpg
321- Santa Claus Conquers the Martians Misfit toys
MisfitToys.jpg
Wish squisher
Images-13.jpeg
322- Master Ninja I Pop-up books for adults
AdultPopupBooks.jpg
Boil-in-a-bag IVs
TheMadMasterNinja.jpg
323- The Castle of Fu Manchu Extremely useful phone circuit/the big head again
PhoneCircuit.jpg
Joe Besser "Stinky" bomb
StinkyBomb.jpg
324- Master Ninja II Perpetual hamster habitat
PerpetualHamsterHabitat.jpg
Conveyor belt buffet
Conveyer Belt Buffet.jpeg
401- Space Travelers The dollaroid
Dollariod.jpg
Facial tissue
401-tissue-0.jpg
402- The Giant Gila Monster Sitcom radio
SitcomRadio.jpg
Renaissance festival punching bags
RenFestPunchingBags.jpg
403- City Limits Mr. meat and potato head
MeatPotatoHead.jpg
Pop star Tupperware
MST3k City Limits- MN as Morrissey.jpg
404- Teenagers from Outer Space Scratch and sniff report cards
Scratch&SniffReportCards.jpg
Resusci-Annie ventriloquist doll
Rescesi-Annie.jpeg
405- Being from Another Planet Jack Palance impersonation kit
JackPalanceKit.jpg
Tragic moments figurines
Tragic Moments Figurines'.jpg
406- Attack of the Giant Leeches Insty-adolescence kit
AdolescenceKit.jpg
Patches the leech
PatchesLeech.jpg
407- The Killer Shrews Jim Henson's Edgar Winter Babies
Mst407 - Edgar Winter Babies.jpg
The Mads try to destroy the Earth
DestroyEarth.jpg
408- Hercules Unchained The Steve-O-Meter
Images-3.jpeg
Decorator Roaches
DecoratorRoaches.jpg
409- The Indestructible Man Cereal Novels
Unknown-3.jpeg
Secret Invention
SecretInvention.jpg
410- Hercules Against the Moon Men Super freak-out kit
SuperFreakOut.jpg
Deep Hurting!
TV's Frank & Dr Forrester; DEEP HURTING!.jpg
411- The Magic Sword Big gulp berets
Images-8-0.jpeg
Designer bio-hazard absorbent throw pillows
BiohazardPillows.jpg
412- Hercules and the Captive Women The womb mate
WombMate.jpg
The lawn baby
Captive2.PNG
413- Manhunt in Space Recycled paper clothing
PaperClothing.jpg
Beanbag pants
Beanbag Pants.PNG
414- Tormented Aunt Catherine Wheel
AuntCatherineWheel.jpg
Drinking Jacket
Images-10.jpeg
415- The Beatniks Pocket pool
Images-10-1.jpeg
Good-Luck Troll costumes
Unknown-7.jpeg
416- Fire Maidens of Outer Space Nike Air Chalada
4988461501 b80173750c z.jpg
Big checkbook
Big Checkbook.PNG
417- Crash of Moons Rock and wreck guitar
Rock&WreckGuitar.jpg
Sugary Deep 13 toothpaste
Images-9-0.jpeg
418- Attack of the the Eye Creatures Funny gag fax
Eyecreatures3-0.PNG
Router Ouija board
RouterOuija.jpg
419- The Rebel Set Abstract paint-by-number kit
AbstractNumberPaint.jpg
Quick primp kit
Images-12-0.jpeg
420- The Human Duplicators Beanie chopper
Poorjoel.jpg
William Conrad fridge alert
Human2-0.PNG
421- Monster A-Go Go Non-violent action figures
Hqdefault-0.jpg
Johnny Longstorso
421 042.jpg
422- The Day the Earth Froze Snacktion
Images-10-0.jpeg
Unhappy meals
Dayfroze3-0.PNG
423- Bride of the Monster Microwave Faith popcorn
MicrowaveFaithPopcorn.jpg
The tough love seat
ToughLoveSeat.jpg
424- "Manos" The Hands of Fate The cartuner
MST3k Manos- Joel and crew invention exchange is The Cartuner.png
Chocolate bunny guillotine
MST3k Manos- The Mads Chocolate bunny guillotine invention exchange.png
501- Warrior of the Lost World Bittersweet Hearts
Images-11.jpeg
The square master
Warriorhost1.PNG
502- Hercules Instant karma
InstantKarma.jpg
Cellular desk
CellularDesk.jpg
503- Swamp Diamonds Andrew Lloyd Weber Grill
MST 27.png
U-View
UView.jpg
504- Secret Agent Super Dragon Micro-golf
MST 26.png
Virtual comedy
VirtualComedy.jpg
505- The Magic Voyage of Sinbad Rat Pack chess set
Hqdefault.jpg
Chinderwear
Chinderwear.jpeg
506- Eegah Pork-orina
Pork.jpg
Replacing Frank's blood with anti-freeze
AntifreezeBlood.jpg
507- I Accuse My Parents Junk drawer organizer
Junk Drawer Organizer.jpeg
Cake 'N' Shake
Cake-N-Shake.jpeg
508- Operation Double 007 Sarah the bobbin buzzard
BobbinBuzzard.jpg
Lederhosen-hosen
LederhosenHosen.jpg
509- The Girl in Lovers Lane Doc Martens for Don Martin
DocDonMartins.jpg
Evil baseball promotions
Images-19.jpeg
510- The Painted Hills Back-talk
BackTalk.jpg
Cholester-do all
CholesterDoAll.jpg
511- Gunslinger New whiffle items
WhiffleItems.jpg
The scanner planner
ScannerPlanner.jpg
512- Mitchell Daktari stool
512-stool-0.jpg
None (Mads are being audited)
Mitchellmike-0.PNG

Mike Nelson Era

Episode Mike's Invention The Mads' Invention
513- The Brain That Wouldn't Die The gutter bumber shoot

Images-17.jpeg
The dream buster
DreamBuster.jpg
514-Teen-Age Strangler The waiter-baiter

WAITER-0.PNG
Frank-n-Forcer
FrankNForcer.PNG
515- The Wild Wild World of Batwoman Razor-back

IE-515-SOL.jpg
Atomic powered hair dryer
IE-515-MAD.jpg
516- Alien from L.A. Fridge udders
TEATS-0.PNG
Vend-a-gut
VENDAGUT-0.PNG
517- Beginning of the End New playing cards
IE-517-SOL.jpg
Re-comfy bike
IE-517-MAD.jpg
518- The Atomic Brain The Mads
Botsasmads-0.PNG
Crow and Tom Servo
Madsasthebots-0.PNG
519- Outlaw Fabio Kit
Outlawhost.jpg
Really real time machine
RealTimeMachine.jpg
522- Teen-Age Crime Wave Escape via rocket pack
Lox.PNG
Mace Mousse
Macemousse.PNG
612- The Starfighters Cowboy Mike's Red Hot Ricochet Barbecue Sauce
BoldSauce.jpg
Cranial Ports
CranialPorts.jpg

Jonah Heston Era

Episode Jonah's Invention The Mads' Invention
1101 - Reptilicus Bubble Fan
1101BubbleFans.jpg
N/A
1102- Cry Wilderness Turkey-Theremin
TurkeyTheremin.jpg
Carvel Clock
CarvelClock.jpg
1103- The Time Travelers Dr. Crow's Old Time Edible Silica Packets
EdibleSilicaPackets.jpg
Afterlife Alert
AfterlifeAlert.jpg
1104- Avalanche Mouth Vacuum
MouthVacuum.jpg
Don la Font-aine 3000
DonLaFontaine.jpg
1105- The Beast of Hollow Mountain Disco Cannon
DiscoCannon.jpg
Titanic Hot Water Cannon
HotWaterCannon.jpg
1106- Starcrash BB-Servo
BBServo.jpg
Band-eat-o
Bandeato.jpg
1107- The Land that Time Forgot M. Night Shyamalan Living
MNSLiving.jpg
Elder Pump
ElderPump.jpg
1108- The Loves of Hercules Fried Turkey Dunk Tank
FriedTurkeyDunkTank.jpg
Mexican Jumping Beanbag Chair
JumpingBeanbagChair.jpg
1109- Yongary - Monster from the Deep Tiny Desk
TinyDesk.jpg
Hitler Coffee
HitlerCoffee.jpg
1110- Wizards of the Lost Kingdom Verbal Smoke Bombs
VerbalSmokeBombs.jpg
Sponsor Clock
SponsorClock.jpg
1111- Wizards of the Lost Kingdom II GIF Notes
GIFNotes.jpg
Punt Bunnies
PuntBunnies.jpg
1112- Carnival Magic Yeasta Pet
YeastaPet.jpg
Flavor Sweat
FlavorSweat.jpg
1113- Il Natale Che Quasi Non Fu (The Christmas that Almost Wasn't) Re-Gifter
ReGifter.jpg
Humbug FM
HumbugFM.jpg
1114- At the Earth's Core Permanent Temporary Tattoos
PermTempTattoos.jpg
Rip Taylor Urn Cannon
UrnCannon.jpg
1201- Mac and Me Spez dispensors
SpezDispensors.jpg
Algernon
Algernon.jpg
1202- Atlantic Rim Inflatable Air-Dancer Organ
AirDancerOrgan.jpg
Supposi-Stories
SupposiStories.jpg
1203- Lords of the Deep Hand-Dryer Air-Hockey Table
HandDryerHockey.jpg
Drone Probes
DroneProbes.jpg
1204- The Day Time Ended Fortune Meal
FortuneMeal.jpg
Spray-On Mustard Gas
SprayOnMustardGas.jpg
1205- Killer Fish Alchemy Glue
AlchemyGlue.jpg
Time-Travel Oven
TimeTravelOven.jpg
1206- Ator, the Fighting Eagle Swiss Army Cheese
SwissArmyCheese.jpg
Totino's Pizza Roll Popper
PizzaRollPopper.jpg

Behind-the-scenes

The Invention Exchange was created as a means of featuring the "prop comic" nature of show creator and original host Joel Hodgson's humor.

The first few episodes with Michael J. Nelson in the lead also featured invention exchanges, but they were soon phased out to accommodate Nelson's less prop-oriented brand of humor.

When the show returned with Hodgson at the helm and new host Jonah Ray, the Invention Exchanges returned.

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