So does anybody have any cool ideas for special rules for the zombie kids.
I'm going to give this one a try with my co-op version of zombies "The Days After": If you don't kill a zombie kid in combat it "attaches" to you and makes you lose 1 action point for every kid attached until you are dragged under or kill all the kids attached. Obviously more than two zombie kids can enter your square at a time.
I don't have my kids with me (at work atm) but they are half as tall as normal zombies, and a lime green color (rather than off white or olive green). They just have one sculpt, one hand at their sides and the other reaching up as if to claw at the hero (or hold an adult's hand).
The rule for zombie kids (when used) allows for a kid to occupy the same square as an adult zombie, effectively letting you double-up and force someone fighting in that square to resolve 2 combats before moving. Quite handy, but also can rack up zombie kills quickly if the opponent is lucky.
I'm currently waiting to get my hand on the Zombies 4 expansion, so i can have the tiles, cards, and all those delicious zombie dogs.