In order to paint something you need to choose a character or at least a colour. First way to play this game is to use colored crayons. But it’s not so easy.
The second one is simpler. You can just fill the image with the paint you like. To change the color you use, just click the square on the right and after that create the color you need using the special instrument.
That’s not the only feature: you can even load your own color image and save it to your device. Use it like a background for your desktop. Or you can also print these pictures.