Yes, you can and should lock your toy crane machine to prevent use when you're not around. This is a common practice for owners to ensure safety, prevent unauthorized play, and manage operational hours. Most commercial crane machines come equipped with a built-in lock, typically a key switch located on the side or back panel. Turning the key to the "off" position disables the coin mechanism and controls. For an extra layer of security, you can use a padlock to physically secure the prize door or the main cabinet. Simply unplugging the machine is also an effective immediate step to disable it. Implementing these measures protects your machine from wear, tampering, and potential liability issues, giving you peace of mind during off-hours. Always refer to your machine's manual for manufacturer-specific locking instructions.