This is a kit with a Freescale development board that you can program up and wear as a badge on a lanyard: it has a light sensor, buzzer, touch sensor, IR transmitter and LEDs; comes with demo applications and an SDK to write your own.
collect from close to East Putney tube most days
Windows 7 Freescale sensor badge board (Wandsworth SW15)
This offer has been gifted to someone and is no longer available.