I've been wanting to do this for awhile.
I made 2 because one is for a friend.
I got the idea from Pinterest here.
So I still need to spray the finishing coat on them, but for the most part they are done.
I'll hang it on the wall (6" off the ground), and find a non-bleeding pen to mark the kid's heights.
If you are wondering, I used 2 different paint pens for the markings. A regular paint pen for the lines and a special wood pen/marker for the numbers because it had a pointy tip.