Know any good quartet music for a childrens concert?

[tubaben]

Hey all,

My tuba-euphonium quartet, The FunderCats, is playing on the "lollipop concert" in conjunction with the Waterloo-Cedar Falls Symphony. We need some music appropriate for children. We have until April 11th to work on it, so it shouldn't be anything that will take a long time to work up.

I appreciate your suggestions,

Ben Creswell