The Mecha Mushi from R/C toy maker Taiyo is a bug-shaped helicopter designed for indoor flying. It has an internal battery which is charged by a connection to the remote, and a light foam body which is actually quite stable. Maybe this is good for passing out memos/pink slips around the office without having to get up?
A 30-minute charge will get you a 6-minute flight around the room controlled by infrared controller. Below is some video I shot at the Tokyo Toy Show back in June.
Buy the Mecha Mushi online
Michael is the Editor of JapanTrends.com and Director of the 
Finally, something I can use to chase around the cats in my front yard.