We bought these Hide 'N Squeak Eggs for our son who just turned 1. he loves taking them out of the egg carton and trying to put them back in. Not only is the design cute and fun for kids, it is great for strengthening their developmental skills. The bottom of each egg has a specific shape, so it only fits in one of the spaces in the egg carton. And, once he starts noticing finer details, he'll figure out that the eyes on the chicks can be matched with the eyes on the egg shells. Fantastically fun - and I'm already considering purchasing this again and sending it to a friend's daughter!