Can you solve the problems and find out what colour to use for each part of the butterfly? Tap the button. Solve the + and - problems you see - the answer tells you what colour to use for that part of the picture, e.g. 10 - 1 = 9 so you colour this part blue. Use the , or to colour in each part, remember to change the size of the tip, tap the tool twice. when you're finished.