The ATtiny85 ISP! allows you to work with the Atmel AVR ATtiny85 chip easily on a breadboard with a 6-pin ISP programmer such as the USBtinyISP (programmer not included).
The ATtiny85 chip (not included) is Arduno IDE compatible and lots of Arduino code will port right over with slight modifications to things such as pin number etc.
This product includes one ATtiny85 ISP! printed circuit board only. You supply all other components. Full kit instructions are here: