Here is another STEM kit that encourages learning through play. The Zubi Flyer is a hackable frisbee with 12 educational games (such as Catch the Light, Hot Potato, Copy Cat, Hand Harmonica, and Pong). They test memory, create light art, and more.
You can plug in the frisbee into your computer to reprogram each code. It is powered by an ATmega32U4 microprocessor and works with Arduino IDE.