From vertical drops, spinning cogs to vortex bends, Waterslide – Marble Run uses expressive little marbles with water to demonstrate basic physics concepts like momentum, gravity and speed in a fun and engaging way. Waterslide – Marble Run provides multiple interactive water explorations and develops key STEAM skills including: problem solving, creative thinking, critical analysis, independent thinking, testing and exploring The 21 separate pieces (including four funny faced plastic marbles) are designed to work together so kids can build their own waterslide, limited only by their imagination. Sections stick to the side of the bath or bathroom tiles using suction cups.