Arduino-powered hacky-sack game

Hackyhack is a fun project by Dustin Jessen and Chanika Remest that packs an Arduino mini, an LED, a speaker and a piezo knock sensor into a hacky-sack ball. The LED flashes and the speaker emits a sound with every kick, and thirty successful kicks causes a song to be played.

More:

• HOW TO – Make your own hacky sack / footbag