The Raspberry Pi 3 is the third generation Raspberry Pi. It replaced the Raspberry Pi 2 Model B in February 2016.
You're going to work hard with your Raspberry Pi 2 Model B or Raspberry Pi 1 Model B+. You're going to have to solder, code, and Linux your Maker heart out. That's why we've tried to make it as easy as possible to start - by combining the Raspberry Pi with what we think are the best beginners' Pi accessories into one easy to use kit.