This is a topic under hobbies.

A hula hoop is a toy hoop that is twirled around the waist, limbs or neck. They have been used by children and adults since at least 500 BCE. The modern hula hoop was inspired by Australian bamboo hoops which were then made of plastic and popularized in 1958 by Arthur K. "Spud" Melin and Richard Knerr. Hula hoops for children generally measure approximately 70 centimetres (28 in) in diameter, while those for adults measure around 1 metre (40 in). Traditional materials for hoops include willow, rattan, grapevines and stiff grasses. Today, they are usually made of plastic tubing.