80 First Builders blocks for hours of playAttachable wheelbase to create cars and trucks of all colors and sizes to be assembled by the usersCompatible with all Mega Bloks First Builders sets for endless building possibilitiesPortable, PVC-free bag zips to store all pieces. Non-Woven, PVC Free and BPA Free Bag.Nothing matters more to us than the safety and wellbeing of children. All of the materials used in Mega Bloks toys have been reviewed and tested to make sure they meet or exceed all applicable requirements and are completely safe for children.