Frog Blowing

Get a thin drinking straw from a Calypso packet. Catch a frog. Spawning season is a good time, as they're too busy clambering all over each other to bother about having a thin straw stuck up their anus. Stick the thin straw up the frog's anus. Blow gently. Believe it or not, this inflates the frog, which cannot then deflate.
Added fun : launch the bloated frogs on a pool and try to burst them using marbles launched from Black Widow catapult.

There’s only one thing we hold sacred here on Playground, and that’s TRUTH. (And fags. Fags are important as well.) We believe this entry to be unmitigated bollocks. However if you know different, if you are a zoologist or specialist in frogs anuses, please write in. If you’d like to write in just to go "aaaaaah, an*nym*us u*e* is a vast liar and probably GAY", then that’s all to the good too.

We can’t even guess how you’d go about finding a frogs anus.

Aaaaaah, an*nym*us u*e* is a vast liar and probably GAY.
So there.