Material: Plastic. MAGIC SPRING: The rainbow circle trains baby's finger dexterity and body coordination. Use them for kids party favor bags, party favor boxes, pinata fillers, toys and other birthday favor bag fillers. Specs: It's fun to stretch these colorful springs and watch them snap back in no time. Best Prizes: Kids Toys are the perfect companion for any playroom and play day school rewards and kids prizes. The perfect pastime at home or during recess at school. Use as a carnival prize, playful nata, fun prank gift or classroom reward. MAGIC RAINBOW SPRINGS: Great for gift giving or party favors. Magic Rainbow Springs is a stress reducer, pen holder, memo holder and artwork. New and fun: wonderful gift toys for Easter, Halloween, Christmas. Your birthday party supplies are essential for your next special event beach party and other kids party games. It's also a great kids prize.