What factors influence kiddie rides?

There are many kiddie rides.but the price varies,then what causes the differences among different kiddie rides?

First,the material,most of the materials are divided into two types.they are domestic materials and imported materials,but the prices different from several hundred to a thousand yuan possibly;

Second,the production process,different production processes result in different prices because each process has its own input costs. Third,the market supply and demand,in fact,economic develops rapidly,the demand for kiddie rides is great,it can be said that the supply is short,in this case,the price will not fall until in the off-season.