Having three kids (5 and under), I have been to most of the indoor plays / bounce houses (Fidgets, Tykes N Tots, Pump It Up, Child's Play, Jumper's Jungle, etc.). I thought KangaMoo was big until we visited this one. This is by far the biggest and the best indoor play Vegas has to offer.
Is the fee for admission expensive? Yes. On a regular day, it is $16.95 for the first kid and $12.95 for each additional kid. However, if you check it out on Tuesday and Thursday it is only $8 (Happy Hour price which is more than reasonable). Other in-door play places you go to $10 is average, and it is not close to the size of this. They also have free frozen yogurt on certain days from 1:30 - 4 p.m.
The both times I have taken my kids (3) here they spent at least 2-3 hours just running around and going on the same slide. Other places I have been to they get bored after the 1st hour or so.
I have yet to try the food but you can always leave to grab real food and get admitted back in. They have a spacious dining area to eat at and seats on the side of the play area to watch your kids.
If you are looking for a place for your little ones to have fun, I would highly recommend this place (for kids 10 and under) on a Tuesday or Thursday. We have memberships to the Discovery Children's Museum and Cowabunga Bay too (and my kids would rather go here).
The only reason for the 4-star is the regular admission prices. They also charge the 2nd adult ($5).