Here is our tree all decorated by the grandchildren. They did an awesome job! I've pointed out an ornament from our 1st Christmas tree 32 years ago.
Shimelle suggested maybe doing the dates the same way to bring some continuity to the pages. So on each page I've used a round tag, with a rub on #, ribbon behind it, and brad to secure it...of course there is a 1/2" glue dot holding the tag on as well.