They have an ongoing Groupon deal, $30 for 160pts. You can use it for bowling, mini golf or arcade play. Definitely worth it
For 4 to 6 year olds, I'd recommend a different place like Chuck E cheese. Family Fun Center is catered to kids a bit older. They have to be a certain height to do go karts as a passenger. There aren't very many things for that age group. There are a ton of arcade games, but I could see your kids getting bored after an hour or so. There is laser tag and bumper cars, but again there's the height requirement and also a lot of older kids. You'd probably spend at least $75. Don't bother with the wristband unless they're tall enough for go karts and bumper boats.
Depending on what you do there is tons to do here. If arcade games are what you want only you can buy cards from $40-120 with games costing between 4-20 credits. If you want boweling or laser tag thats a separate cost. You can buy wrist bands for $32 for 3 hrs with unlimited go kart, bumper cars, vr theatre, frog hopper and mini golf. For my family 2 adults and 2 kids (9 &13) we bought 4 bracelets and a 45 dollar game caed and spent around $200 for 3 hrs of fun and dont regret it at all. If u ride go karts 3 times the bracelets pay for them selves. Hope that helps
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