Smart locking safe	Twisted Plastic (RC cars)
The Glove	Light-based communication
Smart mirror	Arithmetic and athletic battle
Nerf turret system	OG futbol squad
Team Rocket (more soccer)	Inverse pendulum (self-balancing vehicle)
Power board--powered skateboard.	Team Spy--nerf turret
Automatic checkers	Super tank blitz
Finger Beatz	Rubik's cube
Smart following and IMU controlled robot	Lightsaber combat
Robot lasertag