1/2 cup salt, 1/2 cup flour, 1/4 cup (give or take) water. Knead until dough forms. Make impression. Bake at 200 for 3 hours. Great keepsakes, fun party activity for kids, or do every summer and make a stepping stone path :)
Salt dough recipe: 1/2 cup salt, 1/2 cup warm water, 1 cup flour. Rolled out the dough and cut the shapes. Then poked large holes for the string, baked them at 250 for around two hours (until hard all the way through).