In the 1930s, researcher Mildred Parten defined play six stages which mirror children's social development. Unlike Jean Piaget who watched children's drama in largely cognitive or intellectual terms, Parten highlighted the idea that learni…

The main customer group of indoor amusement equipment are children and teenagers. So security is the top priority. The height limit: total height is acceptable for in the indoor equipment. Noise limits: the product in an indoor have echo c…