This student found a "Life Hack for Kids" video on Youtube and made these cell phone holder/amplifiers with toilet paper rolls. The great thing was that he was able to explain how they worked.
Some students even made their own items to sell at their store.
Ribbons
Stuffed Animals
Lollypops
Designer Bottles
Jewelry and Rocks
One even had moving parts. This was a "wack a mole" type game
Check out the levels under the table...pretty cool making.