The Carbon (C) , Hydrogen (H), Nitrogen (N), and Oxygen (O) business?
My friend Elizabeth's son Graham, 9 1/2 years old, made up his own. And it is awesome.
The elements that make up boy version "Graham 9.5" include Bacon (Bn), Money (My), Ice Cream (Ic), Harry Potter, (Hp,) Cowboy (Cb), and Angry Birds (Ab).
Summertime, Ninjas and Llamas also make an appearance on Graham's chart.
Parks & Recreation (Pr)
Thanks Graham! You will inspire many charts over the next few years, I can guarantee you that!