Making a toy crane machine more challenging for older players enhances its fun and replay value. The key is to adjust the machine's mechanics to require more skill. Start by reducing the claw's grip strength. This makes grabbing prizes precisely more critical. You can often adjust this via a potentiometer inside the machine. Next, use heavier or awkwardly shaped prizes. Smaller, denser items or soft toys with less surface area for the claw to grasp are perfect. Strategically place these prizes. Layer them flat or nestle them tightly together instead of stacking them loosely, making it harder to isolate a single item. Consider increasing the playtime cost slightly for a higher-stakes feel. Finally, adjust the claw's drop point or swing speed if your machine allows, adding an element of timing mastery. These modifications transform a simple game of chance into a test of skill, providing lasting engagement for teens and adults. Always consult your machine's manual for specific adjustment points to avoid damage.