A two-disc cd set of ALL Don's materials, includes:1. book: "Calculus By And For Young People (Ages 7, yes 7 and up)"2. book: "Calculus By And For Young People - Worksheets"3. "A Map To Calculus" - 15x18inch poster-map, overview4. Video#1: "Infinite Series By And For 6-Year-Olds And Up"5. Video #2: "Iteration To Infinite Sequences With 6- to 11-Year Olds"6. book: "Changing Shapes With Matrices"7. "On Thinking About And Doing Mathematics" - 11x14 inch posterThese discs need Adobe Reader - link included and Windows Media Player - link included.