Hexbug’s touch-and-sound-sensitive mini-robots have always moseyed, not scurried. But their latest, the Ant, locomotes with wheel legs—not quite a wheel, not quite a leg—zippily enough to give real bugs a run for their money.
https://gizmodo.com/bandais-hex-bugs-react-better-to-clapping-than-stamping-274194
It’s got a new butt sensor, in addition to the usual antennae. It’s cheap too, only $10.