As soon as your kid can read, have them play this game!
This game is wonderful and one of my favorites. I'm 18 and I play it constantly, but maybe I'm just a kid at heart. It's truly an all ages enjoyable game. The characters and role models are excellent. The whole point of the game is to make friends, help your friends, and help your neighbors while building a successful life on the farm. It helps kids learn to take proper care of animals and cultivate crops, and learn about how things grow. There are a lot of very joyful things there too because the circus is really fun to watch and animals are fun to interact with. A must have for kids that love animals.
Also getting married and having kids is very fun and kid friendly. When you're married, your husband or wife will ask if you want to have a child, and then will say "Okay, we'll go pray to the Harvest Goddess for a baby!" After a few weeks you'll go to the hospital and get your child.