XP: Where to meet up with someone near Waldorf?

JKM416

I'm looking for somewhere to spend a few hours with a friend as she gets her car serviced in Waldorf.  I haven't spent any time in the area and have no idea where to go...other than just looking up a chain restaurant.  There's a mall there, but I don't know anything about it.  So any suggestions would be appreciated for a kid-friendly (DD, DS, and a baby) place: restaurant, shopping center, park, etc.  Thanks!