Garden Balls..a great project to work on with the kids. A styrofoam ball core with glass marbles (round or flat) bits of shell, shiny flat rocks (and whatever else you may choose to add) then all grouted into place. Voila a waterproof garden keepsake
2x4's with black and orange sharpie, very cute!
Reversible Give Thanks / Jingle Bells Blocks
Lay down big puzzle pieces and spray paint over them. Wait until they dry to take the off. These would make beautiful autism awareness shirts.
How to clean the "image" off of tubs to re-use them