Last year for the boys' school summer fair we ran a HexBugs racing game. We built a track out of Lego and the raced Hexbugs along it. Players were able to choose a bug and the winner got a sweetie prize.
This year I thought I'd to enhance the game using some tech to record lap times:
RFID tags for the HexBugs
A Parallax USB RFID scanner attached to a Raspberry Pi running Raspbian
A Sqlite database (running on the Pi) to record race times and other details
Python and Scratch code to pull it all together and provide a simple GUI
Motorola Atrix lapdock used as keyboard/mouse/display
