American Pulse on Instagram: "Turning LEGO into a real submarine sounds impossible — yet this one actually works underwater. ⚙️🤯 Built with standard LEGO parts, a sealed transparent hull, and simple mechanical systems, this miniature submarine operates on the exact same principles as real underwater vehicles. Gears transmit power to the propeller, sealed chambers control buoyancy, and carefully balanced weight keeps it stable beneath the surface. What makes this truly impressive isn’t the size