He is 15, will be 16 in Dec.
I love the link tortisethreads posted! Got some more ideas there.
I love mushrooms, too. Especially the ugly ones from the 70's, lol. My mom hates them, but I think they are just soooo retro.
I found some really cute 70's material at Walmart. It's got disco balls, people with bellbottoms,etc. Thats going to be my border.
I also have some cute Beatles material, with "All you need is love" written over and over in different colors.