I bought 2 of these. One for my son, and one for his best friend. They send messages to each other and they are only 4 years old! I send messages to my son because I travel a lot for work, so now we can keep in touch, especially before bedtime. He knows when Daddy is away, he can always use Hank the Dino to say hi whenever he feels like it. This product is so cool. It's like playing telephone for the modern age. Highly recommended!