Ben Tausig has an upcoming puzzle book for kids, Mad Tausig vs the Interplanetary Puzzling Peace Patrol: A Fiendishly Fun Puzzle and Mystery Book for Kids. The book is intended for 4th to 6th graders. If you have (or know) a kid in that approximate age range who'd be interested in test-solving the puzzles to make sure the difficulty level's on target (and would appreciate a couple free copies upon publication), please drop Ben a note at datageneral@gmail.com.