This collected edition of How Do You Walk on Fire? and How Do You Get an Egg into a Bottle? contains around 200 fascinating science puzzles posing real-world questions for you to ponder and solve. The answer to each problem explains a scientific principle in easy-to-understand terms, so not only are you solving puzzles, you are also having fun while you learn. You'll learn how to boil water in your palm, why you can crack your knuckles, how to walk on fire, why feet feel cold on a wooden floor and of course how you get an egg into a bottle.