You will need:
- wax crayon (or a white crayon)
- water color paint
While the kids napped, I wrote a secret message to each of them using the wax crayon (going over each letter several times assures a clear message). Then, I set up the table so they would find it when they woke up. I told them that I had written them a secret message and that they needed to paint over it to see what it said.The messages were quite simple, and actually a picture may have been better since neither of them can read. But, they liked revealing the message either way.