This free eBook is designed to work on an iPad in the iBooks application. It works on iPhones too, but selecting various objects in the eBook is slightly more difficult.
It may work on other tablets as well.
This freebie is a portion of another product:
Basic Concepts and Following Directions Bundle (click here to view the product).
Unlike other eBooks, this is VERY interactive. It includes animation and there is no pagination. Students help "Sammy the scarecrow" find items of a particular co