My second-grade daughter came up with the specifications, and I whittled them down to create the finished application, "Animal Paradise", which is now available for download.

When you point the camera at a "scribble" drawn on a piece of paper, it automatically cuts out and captures the outline of the scribble.
After placing the animals and buildings, you can enjoy watching the movement of the animals.

You can share the captured "animals" and "buildings" with your friends.
You can just give a paper scribble to your friend, but you need such a function for your friends far away, don't you?