What is it? Doodle Waiting Game

Here is a fun game I played with my kids whenever we had to wait quietly somewhere. All you need is something to write with and something to write on. The first person begins with a simple doodle. The next adds to the doodle (or with 2 players finishes it). The only limits are your imagination and whatever rules you decide to impose. Here are 2 samples that show how the image evolved with the first, second and final doodles. Have fun!