This RFID Experimentation Kit looks awesome. With over a dozen types of RFID tags, a USB based RFID reader and instructions for tons of RFID projects you'll be hacking away in no time. But be forewarned, though the kit provides everything you'll need to get started, the makers assume a baseline level of technical knowledge. So if you're not afraid to get your hands dirty, reserve your copy right away. The RFID Experimentation Kit is already out of stock and on backorder so you'll have to get on it to get one.