Don't feel bad, I've never seen it in any of my games either. In fact, I didn't even know it existed until last night when I happened to see the post about it, lol! All day today I watched for it, but never saw it. I rarely have more than 2 kids per family though, so that might be part of the problem as it sounds like you have to have a lot of kids for it to show up. Although I do have one family with five kids (a single birth, a set of triplets and another single birth) and I played that family for a long time today hoping to see the ball but never did.