I know it's time to get worried when my six year-old is quiet and out of my range of sight. He just isn't a quiet kid. No, it means he's up to something. Usually something big. In fact, the other morning I fully expected to find a warp drive attached to my house. He's always building things with no lack of creativity, so I wouldn't be shocked to look out the window and find we'd flown past Mars or Jupiter and had boldly gone to a galaxy far away.