There's quite a rush for kids to grow up. Parents are pretty stressed out about their child reaching certain milestones at particular times, and if that child does that thing earlier than anticipated, all the better. We want our kids to read as early as possible, to go to the potty the earlier the better, and learn to be quiet and well-mannered. All this stuff has a role in life, but so does just letting it all loose every now and again. There's no reason why parents shouldn't get wild and imaginative, too.