Off-Road Go-Karts
In this two-part season finale, the teams revamp go-karts in a high-speed off-road race.
Motorized Car
Make your own battery-operated car.
The Need For Speed
The teams convert kiddie toys into motorized dragsters.
Paddle Power
Build a boat that paddles itself across a container of water.
Summer Sled
The first season concludes when the DS teams develop and test a "summer sled" for retail giant L.L. Bean.