I've got a few children in my games - The Solis family has Pepper and Aurelia, the de Milo family has their little toddler Hercules, and my Queen family has Wilburt and Everglade. I love Pepper, he's a spitting image of his mother, and he's a shy bookworm. Aurelia is a horse nut and their father has been breeding ponies for his children so she's in heaven. Hercules is the son of my rich snobby sims in Monte Vista and he's going to be spoiled rotten. Wilburt and Everglade are still just baby and toddler, and they live with their parents and grandma. I just usually let kids be kids and send them to parks and festivals whenever their homework is over with. Some are treated like royalty and others have limited amounts of entertainment depending on the family's finances. Usually they have toys and a treehouse, a pool or pond, and of course as much love as their parents can give them all.