This isn't math related, but the kids love it. On the back of my calendar numbers I put a riddle. The Director of the Day reads the riddle and two children get a chance to answer. Then they pick a child to tell the riddle to the janitor at lunch. This has helped develop vocabulary and is wordplay. Quite a hit for us!
In Sept. my "riddles" are more on the trivia side-What town do we live in? How many eggs are in a dozen? Who is our nurse? etc. The first month, I had found that they weren't quite ready for riddles

jerz