Made from flexible vinyl polymers, these mammal molds can be filled with plaster, clay or PerfectCast®, the durable compound used by museum professionals (available from Acorn Naturalists). Use the track casts you make from these molds as instructional aids, pressing the tracks into moist sand or dirt, or use to make ink prints, or compare your impressions with ones found in the field. Everyone can have fun making animal tracks—students or campers can take them home or make displays. Clean occasionally with soapy and warm water. Each mold also features the name of the track and hind (H) or front (F) paw reversed out so that it appears correctly on the positive. Each includes a hind and a front track mold (set), unless designated as "ea" in which case only one mold of one foot is offered).