EBay "Development Programmer Board for ATtiny"
If you don't have experience working with AVRs at a low level then stay away from that. It doesn't provide any connection for a programmer and relies on the Micronucleus bootloader already being in place.

If you really want to experiment with ATtiny development then go with either an Adafruit Trinket or a Digistump Digispark (both of which already have Micronucleus loaded), or get an AVR programmer and (optionally) a ATtiny13/25/45/85 development board that includes a 6- or 10-pin programming header