I found these little wooden numbers at Hobby Lobby. Picked out the numbers 1 - 5 and used acrylic paint to paint them pink, orange, and green.
These wooden frames are from Michael's. I spray painted them black.
I printed my rules and ran them through my little laminator since the frames didn't have any glass/plastic covering. Then glued them to the back of the frames, added the numbers to the corner, and BOOM!
Very simple and it looks pretty good if I say so myself!