The Green Toys Block Set is the world's most environmentally friendly basic building set -- and now it's better than ever! The 18 boldly colored, lightweight blocks have been re-engineered for easier grip and better stacking action. This unique block set includes a variety of shapes for building castles, towers, or any imaginative structure budding architects can dream up. No BPA, PVC, phthalates or external coatings, but plenty of Good Green Fun. These blocks are made in the USA from 100% recycled plastic milk containers that save energy and reduce greenhouse gas emissions. Packaged using only recycled and recyclable materials and printed with soy inks. Recommended for ages 1 and up.