(So I know you can't really read it, but the proudly displayed sign reads "GuyPod"....)
The new, limited release GuyPod, developed entirely by the Hudson Institute, sings AND dances on command and holds, well, who knows how many actual songs. It's not cheap, tends to veto your song choices, has limited reliability and consistency in completing all of the correct words to a song, and is difficult to travel with. While batteries are not a concern, refueling is required frequently and overuse creates a nerve-grating whine. Over time, though, you learn to tune it out.
This original blonde version is really cute, however. Due to demand, it's release was quickly followed by the release of a second, slightly more compact, brunette version (image not available).