My daughter is 11 yrs old i don't think can be considered small anymore (she's 5'2") so Greta was never around her when she was little. On the other hand, my niece is 2 yrs old and my ex girlfriend has 2 little ones. As for Greta's behavior it seems to vary depending on the situation. At home, she is extremely sweet and tries very hard to be gentle with my niece and my ex's little ones she was very good with too. Just gave'em kisses, only issue that ever arose was if something spooked Greta she tried to bolt and knocked over my niece unintentionally. Greta will usually bark and put up a big show for anyone that comes into the door at first, basically just sounding the alarm nothing crazy. If i'm out in public, let's say walking her or in the store is usually fine with children but she wants to come up to them not the other way around. She doesn't really tolerate any stranger just walking up to me without being invited. Once I give the "ok" to be friends she perks up and starts her butt wiggle and will go up to them. She likes children quite a bit and has never been aggressive towards them. 1 out of every 3 walks i usually have some kids that get curious and will come up, she will usually bark a bit and growl and i just tell them she's friendly but let her come to you. I have them hold out their hand in a non threatening manner and she'll go right up and lick'em. They usually go "ewww" and start petting her and she loves it. The key is and always has been strangers are warned to keep their distance until Daddy says its ok.
