remember them from elementary school http://en.wikipedia.org/wiki/Manipulative_(mathematics) Snap Cubes From Wikipedia remember them from elementary school remember them from elementary school Manipulative math manipulative manipulatives Math manipulatives remember them from elementary school remember them from elementary school remember them from elementary school remember them from elementary school remember them from elementary school Snap Cubes From Wikipedia remember them from elementary school remember them from elementary school remember them from elementary school remember them from elementary school remember them from elementary school Math manipulatives