I love this idea...
One neat trick that I learned and tried a couple years ago for a class
reward...(or a reward for a person).... was to take a very interesting art
print and cover it with sticky notes. If you had a great day, or a student
did something pretty awesome, you would have them remove one sticky note. I
actually place one color sticky notes over the most interesting parts and
another color over the less then interesting parts and tell them what color
to pick...so I can keep the most interesting part covered for a long time.
They love seeing their print slowly revealed....
I also have a different art print for 5th graders and one for 6th
graders...and they end up competing with each other.