NEW Mathmaster 3+ Pop-up Book by Ron Van Der Meer Bob Gardner Child Learning Kit. New!!! Still wrapped in original protective wrapping. The Entertaining pages of Mathmaster, packed with crazy pop-ups, humorous illustrations, games and interactive jiggery-pokery, all have a purpose-to empower you, the parent, to introduce your child to the basic concepts of math via your child’s instinct to play. See photos of actual book.