How can you make your car flat on water?

To make your car float on water, you can use buoyant materials or devices like pontoons or flotation bags attached to the vehicle. However, it's important to note that cars are not designed to float, and attempting to do so can be dangerous and illegal. For safety, always use proper watercraft when on water. If you're looking for a vehicle that can traverse both land and water, consider an amphibious vehicle specifically designed for that purpose.