Here are a few ideas for an OOEY, Gooey, Summer.
Most children love pounding, stretching, poking and rolling tactile materials.
You could buy these, but mixing you own doubles the fun and the learning as well. You and your child can make 3-D pictures by squeezing this dough onto cardboard. The salt makes it sparkle when it dries. With your child, measure and mix the ingredients together. If you want to use food coloring, let your child squeeze a few drops into the water.