Self-replicating machine

A self-replicating machine is a machine that can make copies of itself. Think of it like a 3D printer; instead of printing out objects, it prints out entire machines that are identical to itself! The self-replicating machine will have some kind of material that it takes from the environment (such as plastic, metal, or wood) and uses it to build a copy of itself. It also has instructions for exactly how it should be put together and what it needs to do. Once the machine has made its copy, it can then keep making more and more copies of itself until there are many of them around. This could be useful for lots of things, such as making machines that can do specific tasks like build houses, assemble cars, or explore other planets.