BathBlocks Ball run & Waterfall set lets children create ball runs, waterfalls, towers, bridges and more in the bath. Sometimes the most educational toys are the simplest toys-- toys with lots of open-ended possibilities that encourage young minds to think, to create and to explore. BathBlocks bring classic block play into a Fun, fascinating, new, watery environment. The bath tub is the perfect places to create tower, tunnels, bridges and more. BathBlocks empower children to create their vision and build STEM skills as they experiment with geometry, addition, subtraction, multiplication, division, balance, structure and cause-effect. BathBlocks have won Oppenheim gold awards. BathBlocks are made from bacteria and mildew resistant EVA and contain no PVC or phthalates. Warning: age: 3+ years due to small parts.