"The Internet of Things" is the new buzzphrase, but what is it? A toaster that texts? The fitness band on your wrist? The camera in an infant's room? Sure, it's all of those things -- and your cell phone, too! -- that sense your world and report back. The great thing is that it is actually not hard or expensive to make a sensing, communicating object yourself. Doing so can be rewarding, fun, and even useful. This book teaches the basics of building sensors and communicating objects through a series of practical, demonstrative, and fun activities.