The air-dry clay itself is gentle and simple to use — safe for capturing prints from babies, older children, pets, or any family member. As with all our kits, adult supervision is required throughout, and this product is not suitable for unsupervised use by children under 3 due to small parts (the letter and number stamps). We recommend washing hands after handling the clay and after making the impression. Clay may stain surfaces, so please use a protective cover on your table.