We are thinking that sometimes people have way too much spare time on their hands. However, the Yellow Drum Machine is a clever bot all the same. It moves around, collects data, then finds an isolated object to keep the beat. After sampling this for a “good sound,” it will play along with it. It will also keep time if you decide to make a noise or clap. The robot was created for about $120.00 in about twenty hours and runs on 4 AA batteries. Full instruction and details are on Frits’ site.