Canaan calls these handprint pies which I adore.
Great grandparents gifts for Christmas or other, especially for those gardeners in your family.
What you'll need:
A vessel (bowl, pan, pie plate, tupperware container, box, plastic plant saucer, even sand, etc.)
vegetable oil spray
Concrete mix Quikrete
popsicle stick, toothpick, pencil or other tool
glass pieces, broken glass or pottery, mosaic tiles, etc. (optional)
Prepare your vessel by spraying it with vegetable oil spray. Optional: arrange glass, tile or pottery in bottom of vessel. Mix your Quikrete with water according to the instructions. I did about a gallon at a time. Mix well. Should look like thick pancake batter. Pour into vessel. Smooth out and tap vessel on a flat surface to remove air bubbles. Let sit 30 - 45 minutes. Imprint hands and/or feet. Use some sort of tool to write names, date, scripture, etc. (optional). Let sit 24 hours undisturbed before removing from vessel.