Do you remember Willy Wonka's Lickable Wallpaper? Well as an ambitious (and in hindsight, extremely unhygienic) 8 year old, I tried to make my own. It was a 3 step process: 1) Lick a fruit-flavoured candy. 2) Rub wet candy against the wallpaper. 3) Lick wallpaper.
I know, totally gross and it didn't work, so I can't, with good conscience, recommend you try the same thing with Themepaper. More likeable than likeable, Themepaper offers tons of wallpapers, that you can mix together and customize to make a unique background for your phone. Themepaper drops from $3.99 to $0.99.