There is all kinds of drawing and gaming programs in Scratch and its (subjectively) better cousin Snap! Using Pen (very similar to Turtle drawing) is easy and

There is all kinds of drawing and gaming programs in Scratch and its (subjectively) better cousin Snap! Using Pen (very similar to Turtle drawing) is easy and surprisingly capable. But Pen in Scratch is limiting in term of controlling color and output texts. Snap is much better in this aspect. Blending spites and stamping can result in nice effects as well.