Magnets keep pattern block designs in place - a convenient update to a favorite manipulative set.Teaches spatial reasoning, 2 - D shapes, visualization, symmetry, slides, turns and problem solving. Use 98 included soft foam pattern blocks alone to teach all 5 NCTM strands. Features 10 double - sided, write - on/wipe - off magnetic cards (includes 1 blank side) measuring 7.5"L x 6"H and answer key. Grades 1+   WARNING: CHOKING HAZARD - Small parts. Not for children under 3 yrs.