Cute idea for kiddos and the tooth fairy: use extra fine glitter (fairy dust) from Michaels and sprinkle it around on the nightstand with little "footprints" (from your pinky finger). The looks on the kids faces.
Sparkling Tooth Fairy money with glitter hairspray. It's the little things :) Coco is nonstop tooth fairy talk. Couple glitter money with a teeny tiny letter from the tooth fairy and she will be through the moon. She has a ways to go though.
Write a letter to your child or grandchild each year and include money for grad gift. I like this idea of writing a letter, and even adding money, but I think it'd be better to go longer than a grad gift. Wedding, first home, first child?