Pops kiddie pool is actually zero entry...
As other posters said, all four resorts do in fact have kiddie pools. I would say they're around 2 feet in depth at their deepest point. The Kiddie pools are located adjacent to each value's main pool (Surfs up, Fantasia, Calypso, and Hippy Dippy/60s Section)
Pop's kiddie pool is zero entry with several "bubbler jet" fountains, I think four or five. Zero entry is when the pool edges are sloped like you mentioned. Pop also has a pop jet fountain play area located on the edge of the 70s section/60s section. We preferred the kiddie pool area here than at any other value, but preferred ASmu as an overall resort...