My five year old had the best time pressing the shower button for the people as they needed it. There were two of them- one on either side of the pool. He did that for almost two hours. Everyone was kind and patient with him. I couldn't get him away from it.
The pool is a bit deep for the little ones. The kids would probably have to be held by you. Then again there's the diaper rule. Wish they had a kiddie pool.