BAYJOY (formerly Beiyile) Wiggle Roller Ride on Toy Riding Machine Junior Version for Children 2 to 4 Years Old, in Blue Color With Yellowish-Green Seat Beiyile Wiggle Roller is an innovative ride on toy, it mimics wiggling movement of animals to move forward. It has no chain, just three wheels. It is super fun, easy to learn and the riding experience is different from bikes, tricycles or wagons. You can ride it both indoors and outdoors. We have junior version, drifter version and standard version for different age groups of children, even an adult can ride it without a problem. It is safe, the yellowish green seat is made of plastic, kids can ride it on any flat grounds. It is not only fun, but also a great exercise tool. It is easy to install, anyone can install it within 10 minutes, the process is also fun. It has an extendable bar for older child whose two legs are long. It is durable, made of metals, not breakable. We have a really great price for that type of toy in Amazon.