I happened to come across some sheets of Shrinky-Dink paper (you draw on it, heat it in oven and it shrinks to smaller/thicker plastic pieces) so I drew some of the images on this and shrunk them down. They gave me some trouble curling while cooking but I managed to flatten most of them out okay. I also remembered to use a hole punch on each. I then took an old 2x4 and put a bunch of small nails in a row so the pieces could hang on each nail.
I then found a storage tub we weren't using and needed to fill it with something like sand, but less messy. I thought of beads or rice, but then remembered a ton of wheat cans my MIL gave me that I doubt I would ever use. So I filled the tub with a couple cans of wheat, and buried the plastic pieces.
During primary, I had the kids take turns searching through the sand, using silly digging tools. Some did not work so well, but it was funny to see them trying! Then they had to put the piece on the board in the right order, or change one before that was in the wrong place.
It took longer than I thought but it was fun.
