Baking for the Holidays

Ask someone to jot their favorite book on a slip of paper, then cover it with their hand, so you can’t peek.  With a little concentration, believe it or not, you can tell them what’s on the paper!  How?

I have a special paper here that when you look at it, you will see upside down.  Would you like to see it?  You show it to them and they see upside down!