Is there a wall where you usually hang wreaths of childhood banners?
2. How about a pic of the finished tree?
Whether the tallest ever, the scrawniest ever, it matters not. For best effect put a card with the year in large letters in front of the tree for the picture.
Maybe all in pj's? Maybe a shot of just the kids, then just the grownups? Who knows? It might become a collectible if they become famous!
[Again, holding a sign with the year makes dating it later much easier.]
4. Take a pic of each child with their favorite gift/s.
Make a tradition of any of these and you can later assemble a wonderful photo book for each child tracing the history of their holidays!
Image credits: she.suleka.com, shelterpop.com, qheonline.com