This title offers a longer page count than picture books, but a lower word count than chapter books of the same extent. Mo and Jo are fun-loving cavemen whose antics will surely delight kids, especially boys. Follow them as they attempt to de-stink themselves, play hide-and-seek, and make fire.This title offers a longer page count than picture books, but a lower word count than chapter books of the same extent. Mo and Jo are fun-loving cavemen whose antics will surely delight kids, especially boys. Follow them as they attempt to de-stink themselves, play hide-and-seek, and make fire.