This is a tree structured list. A common use for this idea is in our file systems. Not a game- but it could be useful for many types of games. And hopfull it's fun to browse and add things to. you can do so by clicking the buttons You can also add new items, go into them and add more. yippee! Bugs: Adding to the last item puts it on the root level. Adding objects fast messes it up. I'll fix these soon. To Do: Delete items, will also remove child items. Copy and paste items and their children. Rename items About: I'm interested in genetic programming. ...where AI develops itself and learns to solve problems. www.stromcode.com/2008/03/01/evo I need a way to store and easily re-sort and re-size lists of variables in a tree structure, like a file system. This tree will store decisions based on the AI's surroundings. This tree structured list could be useful for many projects types of projects. I started a fourm topic here: http://scratch.mit.edu/forums/viewtopic.php?id=12468 Let me know if you have questions and I'll explain it better.