Use the left and right arrows to select a coloring book image. Use the color bar on the left to select a color. Use the grey scale box to adjust the pen shade. Click on different regions to fill them in with color. (You may need to click a few times to completely color something in.) Press space to clear the drawing. Click the speaker icon to turn music on and off. Click the snow flake to make it snow!
My flooding algorithm is imperfect. I'd welcome suggestions from the Scratch community on improving it! Additional reading here: https://en.wikipedia.org/wiki/Flood_fill Music: Vince Guaraldi, A Charlie Brown Christmas.
