The super-soft clay makes hand-building your creations easy and fun, especially with the help of 3 sculpting tools to add detail and dimensions. With 24 mixable colors to choose from, the possibilities are limitless. Once your project is complete, simply leave it out, and it will harden on its own. Then, if you would like to decorate further, you can use paints or markers to finish the piece. The 24 clays come in 6 airtight tubs and are suitable for ages six and up.