I put a variety of bean and pasta choices in bowls for the kids. Grabbed a piece of cardstock for each, and drew letters for them to fill in however they pleased since we're working on the alphabet with Cooper. He chose to do O. For my two year old, I put the glue in the letter for her, but my five year old was able to do this whole project on his own.
I think next time we'll try a mosaic like this one from Martha Stewart! Aren't those pretty? Canvas vs paper, and more colors. You could make any design you wanted. Can't wait to try this one out myself.