Free and Easy Growing Shell Mermaid Have you ever seen a mermaid come out of her shell and grow? With this growing shell you can! Put the shell in a large bowl of water and after about 48 hours the shell will break open by itself and a mermaid will come out. To make the mermaid grow bigger, leave it in the water for a few more hours. Take the mermaid out of the water when you think she is big enough to play with. Specifications: Color: blue Gender: girls Material: plastic Shell size: 9 x 9 cm Age: from 3 years