“Scholastic Inc., the children’s publisher of favorites like the Harry Potter, Goosebumps and Clifford series, may be best known for its books, but a consumer watchdog group accuses the company of using its classroom book clubs to push video games, jewelry kits and toy cars. The Campaign for a Commercial-Free Childhood” charges that one-third of items sold through Scholastic’s monthly fliers “were either not books or books packaged with other items.”