Thank you for viewing. This is a lock and key set designed to develop number recognition and counting skills. The fine motor skills required to unlock the keys are challenging yet fun for children. They can get used to numbers from a young age. ★Please note★ The number 2 is missing. (Only the key for 2 is available) Everything else is complete. - Product Name: Senior Number Learning Locks - Contents: Lock and key set - Target age: 3 years old and up - Developed skills: Number recognition and counting skills - Colors: Purple, orange, green, blue 〈Product Description〉 A practical way to teach children numbers from 1 to 20. It's the first step in developing early math skills. Children simply match the number on the key to the number and star on the lock. When the numbers match, the key turns and the lock opens. The locks and keys are specially designed for small hands. The set includes 20 locks and 20 matching keys, and an activity guide. Students aged 2 and up (preschool) can develop the following skills: Number recognition Counting skills Fine motor skills Package dimensions: 31 x 21 x 9 cm Please understand that this item is stored at home and has been inspected by an amateur, and purchase accordingly. ※Please only purchase if you are not concerned about minor details, as this is a used item that has been used by a child.