The custion and elastic backrest can be helpful to the health development of Children's vertebration, three kinds of height meet standards of state Education Commission. It adapts to 3-8 children yeas old. It is made of imported PP material, and it is durable and colorfast and UV protection. The quality cannot be influenced by the difference in temperature, Normality it can be used for more than 8 Years. The product can be knocked down to reduce the volume, and be convenient for the transportation.