Our company strictly follows ISO9001:2000 international quality management system standard and EN71 standard. 1:Development of children start work ability, develop the intelligence of children. 2: It is suitable for children age 3+. 3:We have DuoNian experience and professional technology, and sales are also very good 4.This blocks toy is made of china that is durable and non-toxic plastic We are striving for development and innovation and are trying our best to become the leader in the market Contact us if you need more details on Plastic Toy. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Kids Plastic Toy、Kids Plastic Construction Toy. If these products fail to match your need, please contact us and we would like to provide relevant information.