Kids are naturally curious, and there comes a point when most start asking tough questions. They want to know why the sky is blue, if the moon is really made of cheese, and eventually, most want to know where they came from. For most parents, this is the moment when they must figure out how to best explain the birds and the bees. For parents who've adopted, the question has a whole other meaning. Whether mom and dad have been talking to kids about their adoption from day one, or if it's a brand-new concept for them, these books will help get the conversation rolling.