Happyxuan Mechanical Password Box DIY Kids Science school Projects Experiment Kits Boy Toy Invention innovation Creative stem Education Product material:Wooden Product size:13*9*8cm Suitable age:over 6 years old Product functions: kids hand-on ability and creative thinking skills to opreate,give kids a sense of accomplishment children's scientific knowledge children's interest and curiosity Note:The price is for 1 set. The product is non-finished product. Work p
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