Just Think Toys 13 Piece Seaport Set in Reusable Storage Bag BathBlocks bring classic, educational block play into a fun, new watery environment. BathBlocks let children build floating towns, towers, tunnels and more in the bath. BathBlocks are made from Mildew and Bacteria Resistant EVA foam. BathBlocks contain no Pthalates or PVC. BathBlocks have received Oppenheim Gold Award.