Can you make a balloon hover in one spot and move without you touching it when you create air currents? Give it a try!

Can you build a rubber band-powered, paddle boat that paddles across the water? Give this a try and have a paddle race with a friend.

Can you design and build a device that will let you grab and drop objects from at least two feet away? Give it a try!

Can you design and build a watercraft that will keep 25 pennies afloat for at least 10 seconds? Give it a try!