Puzzles are a great introductory exercise that allow students to match shapes and contour using their sense of sight and touch. The pincer grip is introduced with Knobbed Puzzles to refine a child's control of movement, hand eye coordination, and sense of independence. This preliminary activity is a prerequisite for matching, transferring, comparing, and carrying exercises throughout the other areas of the classroom. The Sensorial Knobbed Cylinders will become a familiar extension to this activity as the child becomes more connected to the environment.