Check out this fun website http://shop.cafepress.com/piano.  They have tons of fun piano graphics for t-shirts, sweatshirts, bags, hats, and more.  Here are some of my favorites.

I also liked the phrases, “Have you hugged your piano today?”; “I love my piano too much;” “Practice, Play, Repeat;” and “88 Keys, 10 Fingers, No Problem.”