This is also a handy way to protect your kindle if you are reading in your kiddie pool in the front yard with your boxer shorts and hot dog. I assure you that the Kindle classes the situation up a lot.
Also applicable, regular pools, the beach, on a boat, while cooking...
I like this even better than using an old book, since the Kindle is protected and you don't need to fiddle with turning pages through a bag. Even the touch screen on a Kindle Fire works through the bag!
Step 1: Materials
Step 2: The Complex How
Slip the Kindle into the bag.
Um...go have fun..that's all.
Seriously, did you think it would be harder?