Hadn't seen this thread before - I learnt the song from a class of 5 yr olds who had had an Australian supply (substitute) teacher while I was ill. This was in 1993 or so. In this case she turned Bunny Foo Foo into all sorts of things, so when I teach the song I've felt totally free to turn the wretched wabbit into a tickle monster. Which works very well in provoking squeals from the children.

There is a story version (I think by Michael Rosen) in which there are various variables, but in the light of the contributions to this thread I can at least be sure that the song pre-dated his book (I had wondered).

Anne