This is a small booklet published in 1859, fully available online as a part of Project Gutenberg (also available for download). In addition to the thrilling sensation of browsing through a 151-years-old book, it is very nice to realize that some of the basic parents-children joys remained intact for many generations.
A camel, a pig, several dogs and many other animals populate the book, with clear illustrations of simple hand postures, sure to delight your kids and yourselves at bedtime.
You are more than welcome to contribute your own postures - what new shadows did you manage to create? :-)