A set of four (4) sturdy 8-inch square cards for use with the Froebel Gifts and Occupation material. Our Froebel USA gridcards/postcards are professionally printed on heavy semi-gloss stock and then folded back into one (glued) two-ply card that is very stiff and durable. Each card is printed on one side with a one-inch grid in black ink and in quarter-inch grid in blue ink on the other. These grids are usually sold with Froebel Gifts sets but are useful for designing or with many types of educational toys and learning materials, including Cuisenaire rods or Montessori apparatus.