Playing with robots can be lots of fun. You can buy all kinds of robots online these days. Robot Army’s Delta Robt kit has what you need to build your own robots. Each kit will come with one assembled Hex Brain PCB and all the other parts you need to build robots. You get example code to get started and can use it to create your own custom projects.
This kit has something for beginners and more advanced makers. The delta robot’s brain PCB is Arduino compatible. You can get these on Kickstarter.