The Sharp Shield is a device that allows young children, and others, who have trouble handling a kitchen knife to cut food items without risk of accidentally cutting themselves.

The local airport needs to place a toll booth gate at the exit. One sensor will be needed to open, and one to close, the toll booth gate. A red light should be on when the gate is down or moving. When the vehicle goes through the intersection the gates will be up and the light will be off.

The Techville Railroad Company would like to install a bridge to cross the Tekrocks River. Teddy has researched many possible designs and has decided to install a turntable bridge. You must design, create, and program a working model of this turntable bridge. The bridge will allow trains to cross the river when it is in the closed position and will allow boats to pass when it is in the open position.

Method to collect and store the water wasted while waiting for the shower to heat up.