Our corresponding locks u0026amp; keys give kids hands-on practice with matching and countingnMatch the numbers on the locks u0026amp; keys--and the locks unlatch!nChildren identify numbers, count from 1 to 20 and boost fine motor skillsnIncludes 20 locks with 20 matching keys that have holes for easy storage and versatilitynFor ages 3-6 yearsnUnlock the power of numbers! These corresponding keys u0026 locks give children hands-on practice with number recognition, matching and counting from 1 to 20--while building motor skills! Children simply match the number on a key to the number word or stars on a lock. If the numbers match, the key will turn--and the lock will open for instant reinforcement! Set includes 20 locks and 20 matching keys; locks measure 3 1/4". The keys now include holes, so they can be stored on a key ring or string (not included). The new and improved keys can even be used for letter sequencing activities!