The Megasketcher measures roughly 45 cm x 30 cm (18 in x 12 in), with the magnetised "screen" taking up most of the surface area. A magic "pen" (attached by a piece of string to avoid losing it under the sofa) allows children to draw, scribble and write, while the four magnetised stamps add a different dimension to youngsters designs. Once a composition is complete, or if one too many mistakes has been made, simply pull the eraser lever up and down and, hey presto, it wipes away the redundant drawings.