Year 3: Detective Dan

Dan and his best friend, Billy, turn detective when Dan's lunchbox gets thrown on the ground every day. Dan's teacher says he's becoming untidy, and Dan gets up... » 

Dan and his best friend, Billy, turn detective when Dan's lunchbox gets thrown on the ground every day. Dan's teacher says he's becoming untidy, and Dan gets upset and goes hungry. He knows someone is to blame - but how can he and Billy catch the culprit? «