Children can match the blocks to the holes by matching color or shape. To get the blocks out of the Shape Sorter, just pull aside the elastic band and shake them out! All block shapes are filled with beads to provide children with some rattling fun when they're not busy developing their problem-solving, shape-sorting skills. Hape's Shake and Match Shape Sorter is made to endure years of play with its high-quality solid wood construction and child-safe finishing.