How did Herbert w. sellner come up with the idea of water slides?

Herbert W. Sellner conceived the idea of water slides while observing children playing at a local swimming pool. He envisioned a fun and exhilarating way for them to enjoy water recreation, leading him to design a prototype in the 1940s. His invention, the "water slide," quickly gained popularity and transformed water parks and recreational areas, making water slides a staple attraction for family entertainment.