Buy an RPI starter kit that gives you an RPI, a box, a power adaptor, and an SD card. I recommend:
Then, for the boot camp, buy at least one of the following two kits, depending on whether you want to play with the camera or with buttons, LEDs, and twitter:
- Camera. There are two models out right now: the older 5MP model and the newer 8MP module. The 5MP model is a bit easier to use (no need for a firmware upgrade), but the newer one is reputedly better. Buy one of:
- 5MP camera module from Adafruit or Amazon
- GPIO kit.
- Buy a kit with at least a button, a LED + resistor, a breakout board, and a breakout connector, such as this one.