We've had a few play dates with up to 4 children in here. I would recommend about 2-3 kids is perfect, it was a bit crowded with 4 children attempting to "swim" in here. It was a huge hit, the height is safe for 3 year olds and it's quite large (unlike the smaller kiddie pools) so kids can comfortably move back and forth to pretend to "swim". The unicorn sprinkler arrived with a hole in it, which was a bummer. Aside from that, the sprinkler provides some extra fun for the kids. There is a drainage system which works well and makes it easy to remove the water. You blow up each of the three layers on the sides separately and it provides sturdy sides. I would definitely recommend for water play fun for children!