got a bunch of bananas and two seconds of free time? why not surprise the kids with this one? all you need are these two things::
bananas and a toothpick. that's it. another simple idea for simple minds, like my own. now just let your creativity take over. when you first scratch, nothing will appear to be happening::
don't worry about that, just continue on with your lettering and then leave the area for a couple of minutes. now turn around and come back into the kitchen, or wherever you store your bananas, et voila::
your options are limited only by your vocabulary and sense of humor.
ps - if you've got a kiddo that is opposed to fruit, a personalized banana might just do the trick!