Collide allows you to animate objects. The world simulator is where you can play with the objects you made in the Object Creator. When you download it, you'll want to put the application in the same directory in which you store the Object Creator files. The World Simulator automatically scans the local directory for Object Creator files to add them to its Object selection menu.
This is where the fun begins. After placing a few objects around the screen, play with the object and world parameters to make them interact with each other in different ways. If you turn collisions on, then when two objects collide, they react in one of three random ways:
1. They might bounce off each other.
2. One might break into two smaller pieces.
3. One might "gobble" the other one up. That is, they might merge.

The license of this software is Freeware, you can free download and free use this graphing software.