For the engineering geeks

The Soda Constructor is a website that simulates (using an innovative physics engine) a collection of rods with weighted balls at the ends (heehee) connected and interacting with one another. You can create some very complex systems, or if it fancies you, create a walking pyramid. Grab the nodes, stretch them, throw them around, it's as if they're real live critters! There is even a competition. If you think you can create the fastest and most stable little bugger, go for it! If you are one who can't be bothered, at least check out the Soda Zoo's pre-made models. Some of them give you that feeling of "ahh....I love the wonderful, quirky things I can find while surfing the web!".