Mini Challenges!
New inventive challenges posted each week
466
Waste robot
Invent a waste-sorting robot
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381
Unmeltable!
Design a snack that never melts in the heat
475
Toy in space
Design a space suit for your stuffed toy
165
Roast dinner
Invent a machine that recycles your left over roast dinner
549
Heat
Invent a device that generates heat
149
Tree decoration
Invent a Christmas tree decoration that has an extra special function