Then, I came across Chasing Cheerios' gel board idea linked from Dollar Store Mom. I thought my girls would LOVE this idea! And it's so great that it can be a gel board on one side and a dry erase board on the back. This project actually took me quite a bit longer to make (about 25 minutes each) than I thought it would. Here is what you will need:
EDITED TO ADD: After playing with these for a couple days, I have two more suggestions to make them even better. I might use two pieces of foam core next time to make it a bit thicker and stronger. All our boards have bends in them already which isn't so pretty for the dry erase side of the board. The ziploc bags also have some crease marks and slight scratches in them. No holes for the gel to escape yet, but it made me nervous. So I added another piece of contact paper to the top for more protection. This step would be easier to do before the board was finished and squishy with the gel. I would suggest putting a piece of contact paper on the bag before filling it.