It's only been a couple of years but we've started taking pictures of our kids in the same spot every year. We have a brick outside the TTC and visit it every trip. We probably should get the kids pictures taken in another spot also in case the bick ever (eventually) has to be removed.
Here's Cole at 6 mo. in Jan 2002
And here's Cole at 3 1/2 mo. and Mason at 6 mo. in Dec 2004
We'll have another picture to add to the series this January.