I love this! For around $5 you can visit your local newsagents and pick up an eraser and a stamp pad, take a knife to the rubber to create a shape you like and start stamping! If erasers aren't your thing, try it with a potato or anything else you can find around the house that's hard enough to hold a shape but soft enough to cut... This isn't just a great craft activity to do with preschoolers, it's an inexpensive way to make your own party invites too! Google search silhouettes in images view for inspiration and tell me how you go with it!