There’s a Star Wars comic this year (okay, okay, so it’s a Clone Wars) and everything, plus some folks doing signings. You know the drill.
I would recommend trying out some Vertigo trades as well: Sandman, Fables and Y: The Last Man are good bets, though not exactly for kids.
For kids I would suggest: Bongo (Simpsons), Archie, Melvin Monster, Cars, and Owly.
Also Paul Ens (former head honcho at Starwars.com) has a free comic for Atomic Robo from his new comic book company Red 5.
Personally, I was just thrilled to see Love & Rockets had a free comic! ;-)