Similar question: I have a full day (9:30 am-7:30 pm) stopover in EWR on Tuesday of chol hamoed (4/19). Anything interesting to do with little kids within a 2 hour drive?
If you're really from Jacksonville or the like, would just seeing lots of frum people be interesting for your kids?
You can go to a frum neighborhood - Lakewood, BoroPark, etc - and go to a kosher supermarket, hit a minyan factory shul, windowshop, stop off at the kiddie rides set up for chol hamoed, kosher pizza shop...
My niece from out of NY was fascinated at such a large store where everything is kosher in a neighborhood with so many things run by from people - cashiers, schoolbus drivers, etc.