Here is an adaptation of the old tin punch craft, designed to be simple and safe for young children. The metal is soft enough to be punched without hammering, although hammers or flat rocks may be used to teach motor skills.
Metal Punch, 48 Pack — This pack uses Colorfoil, a low cost tooling foil that is silver-colored on one side, gold-colored on the other side. Use either side for these projects. Kit includes 48 woodgrained 6" cardboard frames, a 4½" wide × 20 ft long roll of Colorfoil, 50