Usborne Internet-linked books contain descriptions of Web sites which take readers further into each subject in a fun and informative way.

The world of light, sound, and electricity is opened up for the curious - explaining such fascinating things as how light travels, what electricity is, and how CDs, computers, and digital television works. A great introduction inot the world of physics. Includes descriptions of Web sites which take readers further into the subject in a fun and informative way.