We took a 1 and 3 year old here on a rainy day to play since they were going crazy in the house for open play time on a Sunday. They have a 3 and under area and a 3+ area. Both kids had a great time. There were slides, tunnels, ball pits, and many places to explore. It was very clean and they do have a private party room. The rules were explained very clearly to us by the girl at the front desk. There are couches for parents to sit and relax on and they do offer wifi as well. This is a great option for rainy or hot days in vegas.
I took a star away because the under 3 play area is enforced by the staff. Many times, kids who were obviously older than 3 were running around that play area and came close to knocking the babies down.