The Swing Cell Compact Device helps students understand the relationship between the braille cell and the keys on a braillewriter. In the closed position, the removable pegs inserted into the blocks represent the dots in a braille cell. In the open position, the pegs represent the keys on a braillewriter that correspond to each of the braille dots. Internal storage of pegs when not in use. WARNING: Choking Hazard — Small Parts. Not intended for children ages 5 and under without adult supervision.