Other kits like the Lilypad?

Hello! For one of my last Units for my Tech course I have to report a proposal to my teacher for other kits and projects you can make using the Arduino program. This entire year we used Arduino's Lilypad. However, the proposal has to simply include what other kits there are that are compatible with the Arduino program, how much they cost, where we can purchase them from and what kinds of projects you can make with them. Please help! If this question isn't clear, I can clarify it further!

have you tried google?

What about the 3D printer. That is a kit and uses Arduinos to power it.