I have done this for her past two birthdays sans the money. I am not sure if I will start putting the money in but I love writing to her to let her know all the amazing things she did that year. Two Naps By Noon: Early Graduation Gift For Baby
This is exactly what I want to do with E's receiving blankets. The baby outfits you can't part with and are put away into tubs made into a quilt... What an adorable thing for Mommy, and a great memory to share with each child when they're older!