The adorable pink counterpart to Prime-8, Penbo is supposedly the "first real robot for girls." It uses the same locomotion tech derived from the buggy RHex robot, but cutified so it waddles:
What's special about Bossa Nova's Prime-8 robot—a $100 descendant of DARPA and Carnegie Mellon Robotics Institute's $20,000-a-pop all-terrain RHex designed for 10-year-old boys? It's the fastest bipedal toy robot ever. Just watch.