Do you have volleyball stamps? Baseball stamps? Hockey? Etc. Then get a personalized stamp that says your team name, or the school your child goes to. How about getting one with your child's name on it! The possibilities are endless!
This other page I made one with a local schools name on it and stamped white cardstock with baseballs all over it. Very fun and NOT very expensive at all! Personalized stamps start at just $5.95.
You can even personalize cards too! Just get the stamp you want and then start personalizing your own stationary or some for your friend.
Some other ideas for personalized stamps... "from the desk of..., from the library of, Merry Christmas from ____. The possibilities are endless.