The app allows kids to pick a color from a set of four (for pre schoolers) and seven (for grade schoolers) and mix them with each other. Each colour is voiced to help with color recognition. A timer also enables kids to guess the answer before it comes. And a three pronged approach, voice, text and color helps to reinforce the learning with each mixing. The pre schooler version covers a palette of 10 colours, while the grade school version expands to a healthy 28 shades, or about the edge of colours we normally think of as simple, identifiable and truly distinct.