Hobbies built around practicing and demonstrating a physical dexterity skill, an activity-participant hobby in Stebbins' typology. Belongs here: juggling, yo-yoing, rock balancing and locksport (the sport of picking locks without a key). Does not belong here: fingerboarding, a build-and-operate model hobby grouped under Model Building and Flight Hobbies even though it also demands hand dexterity.