Use the programming language VPython in an online coding and viewing tool to create 2-D and 3-D objects and simulations. Create shapes, text, include images, and even program in physics parameters to exert control over your objects. While you and students will need to sign in with a Google account to use it, when it prompts you for your name, give an alias. This makes the program safe to use; follow this one step and you will not need parent permission.
Where do I get it?