100% new and high quality CHILD-FRIENDLY- Chattering teeth is100% Toxin-Free & Highly Durable Plastics Made; Adhering Strict US Toy Standards. EASY TO USE - These funny wind up toys are powered by a metal spring that is tightened by turning it, then the wind up toys will move or jump. CHRISTMAS GIFT - With a non-woven Christmas novelty gift bags, you can put the toy teeth wind up or any other small gifts into the gift bag, give your children a big surprise EASY TO HAVE FUN - This classic funny gag joke toy will bring amusement to any situation with its chattering teeth. KEEP YOUR CHILD CALM - In a dental or doctor's office, this chatter teeth toy can help patients relax and stay calm. Attention. 1. Using different monitors, different computers, different camera angles, there may be angle colour problems. 2. 2. Purely manual measurement, there may be 0-1cm error.