This simple project, adapted from "Summer Crafts" by Marjorie Galen (Hylas, 2005), transforms rocks into giant waxy jewels. The secret ingredients? Crayons and heat!
After you've gathered some smooth, flat rocks, clean them off, and bake them for 15 minutes on a foil-lined cookie sheet in a 225º oven.
Using an oven mitt, remove the rocks from the stove and set them on a pad of newspapers (note: the rocks will be very hot to the touch).
Remove the wrappers from some old crayons and draw on the stones -- the heat will melt the crayons into vibrant liquid wax. For the swirly effect shown here, hold each crayon against the rock in one place to create a puddle of color and use the end of the crayon to swirl it around.