One of my favorite STEAM Toys is the Makey Makey. This microcontroller can turn everyday objects into computer keys. It works very well with Scratch as you can further customize how you use the tool. Elementary students used the Makey Makey to turn play dough, paper clips, led drawn on paper, and water into a controller to play Scratch games like Mario, a piano, and Whack a Mole. My middle school students found a tutorial of how to set up an obstacle course using foil to play a game on Scratch, where if they break the circuit, they lose the game. This makes it so they have to hold hands with a partner and stay in contact with foil wherever it may be!
Next year, students will be working to program their own Scratch games to work with the Makey Makey!