Cucumbers, carrots, uh, oh sTimulate,
Just about any food you can rub on it, or stick it in, wrap around it, get crazy, experiment, but most of all, have fun.
And, don't tell anyone what you did, to what their eating.
Unless, you don't like them, but wait till they're finished, then tell them, gets a better reaction.
PS have a camera ready, talk about a Kodak moment.