C.P.
Melaleuca makes a great product called Solumel - it works wonders on all sorts of sticky residues and stains (including permanent marker!), smells great, and is non-toxic. You could even get the kids involved in the clean-up as part of the learning process!
If you don't have an account with Melaleuca, you can drop me a note and I can help you out.
Be Well,
C.
____@____.com