PICKLEBALL is a racket sport for 2 or 4 people, easier than badminton or tennis. It is normally played on a badminton court but with a lower 3 foot high net. It is very popular with over 50s in the USA and is now spreading over the UK. Serving is underarm at waist level but volleying is allowed at any height. The rackets (called Paddles) are like large table tennis bats and usually made of fibreglass. The balls are small plastic. You can watch some demonstrations on Youtube.