The set includes 26 locks and 26 keys. The front and back of the lock are letters and patterns, and the front and back of the key are uppercase and lowercase letters. Two matching methods match the keys with capital letters or locked pictures Learn letters and words by finding the key that matches any lock. When the correct key opens the lock, the child will deepen the memory of the letters and get the joy of accomplishment. The big lock makes it super easy for children to play. Made of durable materials, it can last for years. When your child doesn't like it, you can donate or give it to other children in need. Great gift! Packed in a beautiful box, suitable for one or more children to explore together, this is a very good Christmas birthday party gift!If you have any problems with the received products, please contact us, we will ensure you a pleasant shopping experience.