By using a wood wall chart for keeping track of the children's growth, it can stay in the family forever because the markings are not on the wall. Each time, a measurement is made, be sure to write the date and child's name next to the marking. Because each child will want to keep it, purchase multiples so they each have their very own.
"Growin Like A Weed"
Mark heights with a pen or marker and write the date measured