As a pool owner (3 feet in the shallow end and eight feet in the deep end) and parent of a three year old plus older kids that grew up with the pool — I can not fathom allowing a four year old to explore the yard on their own when this was there. Even if just two feet deep. A body of water that goes down into the ground (which this fountain appears to be) is dangerous to young children, period. I respect other peoples’ parenting styles but I personally don’t understand.