These are superior for developing fine-motor control. Lace the 7 shapes, strengthening the pincer grip that's important for good handwriting. Trace the heavy-duty chipboard shapes that lie flat for smooth tracing. T-Rex is 6 long and come with 7 tipped 36 long laces. Lauri Foam Puzzles are the best and Lauri replaces any lost pieces for the lifetime of the puzzle.Ages 3 and upBy Lauri