To be fair to Sony, the Rolly was so brilliantly daft, coming up with a name must have been tough. And what else do you call a ball that can dance, flash lights and act as an MP3 player? Dance Ball Roller?
Briefly favoured by George Michael as his portable music gadget of choice (we kid you not), it was fully programmable with special software and you could even load pre-programmed dance moves onto it if you got bored of its usual routine.
The gadget spawned some impressive YouTube videos too - check out its rendition of Michael Jackson's Thriller above.