There are 2 malls: An inside one and and an outside one.
http://www.glenbrooksquare.com/
http://www.jeffersonshopping.com/
A cool bowling center
http://crazypinz.com/
I don't have kids so I'm at a loss as to kids activities. There are a couple other members here on the board from Ft Wayne, maybe they will come along and give you some ideas