High-Quality Non-toxic Material: ---Made of high quality non-toxic material, durable, odorless, safe, resistant and environmentally friendly. All the products have been tested and are safe for use by kids. Keeping your lovely kids safe and happy is always our pursuit Perfect Gifts for Kids: ---This water coloring book set is the best gifts for your kids, especially for over three years old kids. Perfect for birthday party, birthday gift, party favor, Christmas, Halloween and any other occasion. Kids also can share it with their friends. It will be a bridge of friendship between children Easy To Use: ---Your child can easily use it, just add the water on our special pen. Then kids can draw by themselvers. After 5-10 minutes for drying, the kids can paint it again. Please feel free to find us if you have any problem for this water coloring book set, we will offer you a satisfied solution within 24 hours