Depends on what you want... I am able to satisfy both my two youngest children each with a $10 30 minutes all you can play game card
It's not cheap, but they have packages. You can get like 2 pizzas and 2 hrs of games for I think $45 or something. Sorry, someone else might have a more direct answer, but it was somewhere around that price. If you take multiple kids, you'll need multiple game cards though, so keep that in mind. And I think it was $30 for a 2 hr card alone. They probably have prices online too.
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