Bonkers is NOT free. They charge $15 for a wristband, which gives you access to the play gym area (which is HUGE) and the rides (carousel, frog hopper, kiddie ferris wheel). The games are extra, as well as the food, which is actually quite good. Don't be surprised that your child will spend $20 on the games and only have enough tickets for a few Tootsie Rolls. All in all, still a fun day and great for parents of older children to just sit and read a book.
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