May I recommend chalkboard paint?
Available at your local hardware store, or the supplies to mix and tint your own colors, ( for Martha's know how and other ideas click here) this stuff is a blast. Just as it sounds- paint yourself a chalkboard- anywhere, any color anytime. Just try it! You can always paint over it if you don’t like it.
The update to this playroom table has been well worth the sanding and a few layers of paint. With a new lease on life the kids have found all sorts of uses for their new chalkboard tabletop, from games of tic-tac-toe, to homework problems, and messages to family.