Simply fill with flammable helium gas and fly through out your home.
Warning - may catch on fire if exposed to electrical spark or fire.
Not recommended to fly in kitchen while cooking.

Should this catch on fire and burn your house down, Your homeowners insurance should, probably, maybe, I don't know, should check it out.. cover it.

I'm not sure how well these things manuver about, anyone know?

Could you be thinking of Hydrogen? Helium is non-reactive.

http://en.wikipedia.org/wiki/Helium

Hindenburg = hydrogen

I just have to say Nemo version is 2 bucks cheaper... put it to gas :p

http://www.amazon.com/Swimmers-Remote-Control-Flying-Clownfish/dp/B005FYCBR6/ref=aconbay

Got two of them for the kids for Christmas. They do maneuver well., however they are quite big and need a lot of space to fly. Putting them together with two people really helps.

The reviews I read of these things are not very good. You have to keep refilling them (not cheap), the skin falls off, shouldn't be used anywhere but indoors, ya da ya da