http://http://education.mit.edu/starlogo/
StarLogo is a great too for getting people to think about decentralized systems and emergent behavior. It's basically Logo from when you were really little, but with thousands of turtles which can interact with each other and their environment (the grid they sit on, divided into 'patches'). It's aimed at middle and high school students but I've had good luck using it with kids at low as second grade.
(Disclaimer: I've taught using this software, and even helped develop it for a little while)
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http://http://education.mit.edu/starlogo/ StarLogo is a great too for getting people to think about decentralized systems and emergent behavior. It's basically Logo from when you were really little, but with thousands of turtles which can interact with each other and their environment (the grid they sit on, divided into 'patches'). It's aimed at middle and high school students but I've had good luck using it with kids at low as second grade. (Disclaimer: I've taught using this software, and even helped develop it for a little while)