If I ever have colorful post-it notes in bulk, some spare time (a lot) and a brain I will sooo try that. (And then have my mom throw it out on me...*sniffle*) I love that! It came out so good.
Actually one time my grandfather gave me a whole ShopRite plastic bag full of different colored post-it notes when I was like, ten. (I had some with roses on them!) I wonder if he wanted me to save them and make him a Mario?