In order to cultivate children's interest in painting, I once bought a lot of A4 paper for training, but even if it is used on both sides, even the painting without position is wasteful. However, the use of magnetic sketchpad is limited by size, and even it is very troublesome to use because it is accidentally dropped.

Recently, it is found that LCD sketchpad is more popular. The most important thing is that the LCD sketchpad can be used repeatedly, similar to drawing on paper. Children like this way of painting, mainly because it can not waste paper.