For all you Tickle Me Ulmo fans,yes, it has truly been done. See here:
Tickle Me Ulmo
Another good one: The Foaming Frodo action figure, comes with giant spider and mouth tube stuffed with baking soda--add vinegar for creating the patented "foam at the mouth" action. Believe it or not, my birthday cake this past year was a "Foaming Frodo" cake, with a cream cheese rendering of Fro-lijah complete with popping eyes (not rolling)
a tube and baking soda into which vinegar was poured. Jolly good, eh?
Or in really bad taste. The cake was really good, I'll tell you!
Cheers!
Lyta
P.S. Here's a picture, just to prove it!