Rating: WORTHY!
This was a great little children's book about the history of phones, including how they work, and how they've been developing and changing over time. It's done in a simple (but not too simple!) and colorful way that will allow any child of the appropriate age range to understand it.
It includes simple instructions to make your own phone (the cup and string method!) and ways to experiment with your design to see if your 'improvements' make it perform better or worse. I think this is a pretty darned good book to get your kids interested in science and experimentation as well as educate them about a small, but ubiquitous piece of technological history. The book is diverse and fun, and nicely done. I recommend it.
