Baby Montessori Sensory ToySmall geometric pin board: the size is 12*12 cm, the color picture title is 25, and there are 5 blank cards. The focus is on geometric creativity, inserting nails first, and then constructing the shape with rubber bands. Large pin board: The board size is 21*21 cm, with 19 topics and 4 blank cards. This is also to insert wooden nails, and then pull the rubber band to build the shape. Nail insertion, this nail insertion idea is good, but in practice,