My Dad is a rocket scientist, and he has written a book, or rather a book on a cd. He is retired now, and looked around and got a little alarmed by the fact that nobody under the age of 60 seemed to have any hands-on experience with small rockets. This is partly because of the decline of the space program, and science training in general, but I think maybe also because blowing things up in one's backyard is frowned upon these days. (When he was 6, he somehow acquired some dynamite and blew the garage door off, proving three things--one, he had some rudimentary idea of safety in that he wasn't injured; two, he was an infant genius of things combustible, and three, it was a simpler time, when blasting dynamite was probably available at the local hardware store.) So,in deference to the fact that probably the purchaser of the book will not have access to a machine shop, or a test stand to make roaring noises and the occasional explosion, there are animations at the beginning