How do you inflate a giant retro space hopper?

To inflate a giant retro space hopper, first ensure you have a suitable pump, like a foot pump or an electric pump with a nozzle that fits the valve. Locate the inflation valve, remove the cap, and insert the pump nozzle securely. Begin inflating by pumping air until the space hopper reaches a firm but not overly tight feel. Once inflated, quickly remove the nozzle, seal the valve tightly, and replace the cap to prevent air from escaping.