Being creative is one of the most important things during your childhood, I think. That’s why toys like K’NEX and LEGOs are always popular with kids. Both examples are great for building stationary objects that look cool, but most creations don’t actually do much. So if you’re looking for some toys that let you be creative, and actually do something when you’re finished, you might look at these Cubelets.

These small building blocks are unique from other creative blocks in that they all have mechanical parts in them. Some do actions like drive or rotate, while others are sensors for things like temperature and distance. You’ll also have blocks that talk between the other two types and tell them how to interact. The blocks are magnetic, and can be assembled in just about any order to create a small working robot in almost no time. Unfortunately like all of the coolest toys, this one is going to cost you. A kit of 20 blocks will set you back a whopping $300.