Engage your child with the Unlock It! Number Match Toy Set. Montessori style learning for pre-schoolers. Description: This set of 20 play locks and keys provides hours of fun and learning for kids. Match the numbered keys to the lock with the corresponding written number or stars. If the the match is correct the key will turn and the lock will pop open for instant reinforcement. Gives kids hands on practice with counting, number recognition, matching, and fine motor skills, and it's also a ton of fun! Designed for ages 3-6.