Color Magnetic Drawing Board, also known as a Magna Doodle, is a toy that allows children to draw on a sealed surface with a stylus, and then erase their drawings with a sliding eraser. The board is filled with a thick, opaque white liquid containing tiny dark magnetic particles. These particles can be drawn to the drawing surface by a magnet-tipped stylus, or removed to the hidden back side by a sliding eraser bar.

When the magnet-tipped stylus is held against the drawing surface, it attracts the magnetic particles to the surface, creating a visible line. The stylus can be moved around to draw different shapes and designs. To erase a drawing, simply slide the eraser bar across the board. This will move the magnetic particles back to the hidden back side of the board, and the drawing will disappear.