This is a drawing toy targeted at 1 1/2 to 2-year-olds. Select the color you wish to draw with, then trace your finger over the open white canvas to draw. To erase, use the erasing tool; to erase everything, hold your device upside-down and shake it (like another drawing toy you might have head of ;) ).
I wrote this game for my second niece. It's a simple drawing game that I will add to from time to time.
Source code is also available if you wish to tweak or tune it to make your own version: https://github.com/fixermark/cecilia-drawing-game