This trackpad kit helps develop hand-eye coordination and basic drawing skills without hurting your eyes. You can paint on paper, clothes, bags, etc., suitable for children, children, students, adults, beginners, cartoon lovers, amateur painters. You can download Pencil Sketch app or other related software on your phone or tablet, select your favorite photo and convert it into a drawing, then start painting. The image will not be projected onto the paper. Through the lens paper, you can see the image on the drawing paper. The trackpad has two sides, front and back, and the projection effect is different on both sides. Please use the front. The bracket has two types of connection methods, simple and quick to assemble, compatible with most mobile phones and tablets. The lens is made of high-quality PC material, which has good toughness and is not easy to break. You don't need to print photos, it's environmentally friendly and energy efficient.