We’ve covered a lot of different robocritters from the BEAM taxonomy in MAKE and here on Make: Blog: rollers, walkers, spinners, pummers, poppers, crawlers. But one we haven’t, and I hardly ever see in the wild, is the robot ball/min-ball. Solarbotics even used to sell a Mini-Ball kit many moons ago (PDF here). I love this gigantic robo-hamster ball spotted on YouTube. I post this in honor of our very own John Edgar Park who did the hamster physics for the new Disney film Bolt.