This is a totally different trip to the movies your kids won't soon forget. Price-wise, tickets are a few dollars more than they are for a regular screening ($9.50 for matinees, and $12.75 for kids and $14.75 for adults at evening screenings), but when you consider that most play places would charge you more than a few bucks for 35 minutes of play time, it works out.
This is a home run with kids over five. Annie had an absolute blast and no problem transitioning from playing to watching the movie. Younger kids will have fun, too, but if your little one isn't great at going to the movies this might not be any different.