Tom writes: Many families have quantifiable, convenient ways to measure their children's growth. When I was growing up, a doorframe in the kitchen served that purpose nicely, with pencil marks showing my brother's and my heights on different dates. But Lisa and I have adopted a more casual approach in more exotic location: Trader Joe's. As you can see in this post from October 2014 , our measurements show James has grown about a head since then. And is quite a bit heavier, too, something the kitchen doorframe did not record very well.