What you buy is not only a family science toys, but also a kind of responsibility and attitude between parents and children in the .Awareness: Train children's practical ability, hand-eye coordination, exercise thinking, develop intelligence and explore science.Let the children experience the sense of accomplishment and satisfaction of completing one thing during the hands-on process, and let the children grow up in learning.Manufactured by hand, using the digital unlocking mode of mechanical password lock, all the code wheels can be turned to the correct position, and the lock can be unlocked by pushing down the button, without power supply or key, with simple structure and easy assembly. Children can put some of their own , toys or pocket money when they are finished.Special fit design, no glue is needed. Just take the parts off the plywood, and you can start an intelligent and interesting assembly journey.Knowledge+Ability Education = CompetitivenessApplicable age: 5 years old+Battery: 2*AA battery (not included)Note:Pay attention when assembling products that need circuits. The is connected to the positive pole of the battery box. The blue wire is connected to the negative electrode of the battery box.are free of batteries, pigments and glue, and accessories are randomly colored, with no specified color. Please read carefully before purchasing.Contains small accessories and sharp objects. Children should be accompanied by adults. Please take good care of children to avoid swallowing.Shipped in parts, assembly required, without batteriesColour:Photo ColorMaterial:woodPackage Contents:1 x Eating Coin RobotOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.