Being a mechanical engineer, this little handbook is awesome for a bathroom companion!<br><br>I always used to break open everything in order to figure out how it worked at the fundamental level, and then my parents bought me K'Nex and Legos so I wouldn't break as many devices around the house lol.<br><br>When I got into college, I realized that 'mechanical engineering' is basically a grown up version of playing with K'nex and I couldn't have been happier with my choice!<br><br>Now this book entertains me for hours!