I take my 3 year old often to the place. This is also one of the favorite places for my friends to hold their kid's birthday party. My kid enjoy running around and riding the small kids rides but does not enjoy much of the games that are there
I personally feel from my experience with my kid that it is best for your kid if they are 5+ as kids below this age might not enjoy the games that are kept there. Below that age I would recommend Rough n Tumble.
Any way, until my kid reaches that age, it will be an average place to me.