Presented first was the latest addition to the Monowheel Ninebot One Z series-the One Z10.

THRILL-CHASERS driving motorbikes, scooters, a shed and a monowheel pitted themselves against sand and tide in an effort to break world speed records on a historic Welsh beach yesterday.

Others on show will include the world's fastest monowheel and the Scootsuit, on which the rider lies in a prone position just six and a half inches off the ground with a scooter engine strapped to the frame.

Inventors led the way with an aquatic tripod to get hunters closer to waterfowl; bone skates, which were the forerunner of ice skates; bow-and-arrow golf, where archers competed against golfers for the lower score; centrifugal bowling, which used a shortened, U-shaped alley with the outer side tilted upwards like a velodrome; an ice velocipede, with a front-pedaled wheel and two rear razor-sharp metal skates; and a monowheel with a giant outer wheel with the driver, controls, and engine level inside it.