16 Pieces Specially Designed Wooden Shapes Fine Muscle Skills Exercises Suitable for the Curriculum Recommended for Pre-School Primary School Special Education Students. The development of hand muscles is very important for writing skills. Before muscle development is completed, pencil-holding and writing skills become difficult for students. The muscle development set consists of drawings specially designed for 16 pieces of wooden molds. Coordination exercises for muscle development are carried out by having students follow the shapes with fingers, wooden sticks and pencils. In this way, students gain the basic skills necessary to write beautifully and accurately. Colors come mixed. Size of Owl 20-5 cm x 19-5 cm Size of Figures 19-5 cm x 7 cm