Green Toys Blocks are the world's most environmentally friendly basic building set! All 18 boldly colored blocks are over-sized and lightweight, making it super easy for tiny hands to stack and unstack. This unique block set includes a variety of shapes for building castles, towers, or any imaginative structure budding architects can dream up. Most importantly, Green Toys Blocks are safe. 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.