Here's the banana piano. That piece of fruit on the right is the ground and tapping the others makes the sounds. The system uses a $50 MaKey MaKey board that features two sides for different skill levels to help with the learning. In terms of software, the Geek Squad uses Scratch, a basic programming app, to sort the intended behavior.

The MaKey MaKey can also be used to create circuits that double as video game controllers, using watermelons or aluminum foil to make jumps or navigate a maze.