ITEM NAME:Mechanical password box diy kids science projects experiment kits boy ME Product material:Wooden Product size:13*9*8cm Suitable age:over 6 years old Work principe:Rotate the code wheel turntable, the code wheel turntable drives the cam to rotate through the tooth bite. When the cam rotates until the inner protrusion is flush with the slot of the column core, it is the correct position of the password. When all the passwords are correct, push the twist down to unlock; in the unlocked state, push the twist upwards, the code wheel turntable and the cam are engaged, and then turn the code wheel dial to reset the password state. Product functions: 1.exercise kids hand-on ability and creative thinking skills 2.easy to opreate,give kids a sense of accomplishment 3.Enhance children's scientific knowledge 4.Inspire children's interest and curiosity Note:The price is for 1 set. The product is non-finished product..Is the correct position of the password. When all the passwords are correct, push the twist down to. engaged, and then turn the code wheel dial to reset the password state. exercise kids hand-on ability and creative thinking skills.