I have to make a rube goldberg online, but I don't know any places I could do that for free. Do you know any?

Certainly! There are several online platforms where you can create and share your own Rube Goldberg machines for free. Here are a few options:

1. Rube Goldberg Machine Contest website: The official Rube Goldberg Machine Contest website hosts an online platform where you can build your machine virtually. You can access the website at www.rubegoldberg.com and create an account to start designing your machine using their interactive tool.

2. Algodoo: Algodoo is a physics-based sandbox game that allows you to build and simulate machines, including Rube Goldberg machines. You can download the software for free from the Algodoo website (www.algodoo.com) and start building your machine using their drag-and-drop interface.

3. Phun: Phun is another free physics-based sandbox game similar to Algodoo. Although it is no longer actively supported, the Phun software is available for download from various third-party websites. You can search for "Phun sandbox download" to find a suitable source for the software.

4. SketchUp: SketchUp is a 3D modeling software that can be used to design complex machines, including Rube Goldberg machines. While SketchUp offers a free version (SketchUp Free), it's important to note that it may have limitations compared to the paid versions. You can access SketchUp Free by visiting their website at www.sketchup.com.

These platforms provide various tools and features to help you create and simulate Rube Goldberg machines online. Remember to explore their tutorials, forums, and user guides to familiarize yourself with the tools and maximize your creativity.