Do a headstand on your couch and try to read a book :).
Try to buy a book from the library.
In school, read your book upside down and see if your teacher notices.
Sit in a public area and pretend to read a book, but hold the book upside down and see how many people notice.
Read a book aloud and in a British accent. If you're British, read it in a Jamaican accent.
Go into public and read a book while its upsidedown.
Go into a library, hold a book upside down and see how many people realize.
Write an entire book about potatoes.
Walk around all day reading a how-to for dummies book upside down.