Sharks For Kids, A Junior Scientist's Guide to Great Whites, Hammerheads, and Other Sharks in the Sea by David McGuire is a very good starting point for a young scientists to find out more about sharks and their family.
Filled with all sorts of facts about these boneless fish from those of the giant Whale Shark to the tiny Lanternshark.
Sharks for Kids uses the combination of fun facts and outstanding photography of sharks in order to convey information that's sure to capture the imagination and encourage junior scientists to learn about sharks.
$16 (includes shipping) plus tax!