Why didn't I think of that??

How many times have you seen some nifty invention that you know made the inventor millions and thought "why didn't I think of that?" Well, a 13-year old in Downer's Grove didn't really make millions on her invention, but it was a good idea nonetheless. She created 200 pairs of pins for the Harry Potter release. One pin read "I'm Finished, Let's Discuss" or "I'm Not Finished-No Spoilers Please!" Her local Anerson's Bookshop began selling pairs for $1 the week before the book release and were all sold out by Friday night. Not a bad idea.