Hearty Clay is an ultra-lightweight, flexible polymer air drying clay. It is perfect for a variety of projects such as card embellishments, miniatures, free-form sculpting, jewelry making, home decor projects, and butter slime making for kids! ACMI Certified Non-Toxic Odorless and not sticky Self-hardening; do not put it in the oven or around open flames Suitable for use with any type of push mold (plastic, silicone, or plaster)