This qualitative study investigated how a group of three-year-old preschool children use the drawing application "Doodlecast" on iPads. The smoothness, rapid response, and distinctive digital visual expressions of the tablet provided visual feedback that influenced the children's preferences for colors. "Doodlecast" seemed to encourage the children to explore colors and superimpose and fill-in the iPad's screen. In addition, they painted very precise shapes and lines, which seemed to facilitate pattern making and discovery of signs and relations. The children used the eraser tool to correct, reveal, remove, and create shapes. Irrespective of the method -- erasing, superimposing, or filling-in the screen -- the clear and professional result seemed to provide a visual confirmation that the children were able to master formulas.