How much would it cost to bring an 8 week old & a 15 month old babies here? Obviously the 8 week old won't be playing or anything

Less than $10 making admittance cost no problem. What you may find troubling is the isolated small and simple babies/toddler's area which they'd be confided to. But honestly there'd be easily an hours worth of indoor amusement for your kids to have for the few bucks it'd cost you to get in.

It is free for the babies but it would cost you approx $7per adult for entry. there is hardly any play area for babies.

Under a year is free...