A 4-year-old boy became "entangled" in a ferris wheel at the A&P Show at Murchison near Westport yesterday.
The boy needed to be airlifted to hospital after the accident on the show ride about 3pm.
The Nelson Marlborough Rescue Helicopter said the boy suffered "moderate arm injuries".
He was assessed by the onboard intensive care paramedic before being flown with his family to Nelson Hospital for further treatment.
Meanwhile, the rescue helicopter also retrieved a 21-year-old man who had been pinned against a tree by a bulldozer yesterday.
The man was trapped at Takaka about 4pm.
He was treated by an intensive care paramedic during the flight to Nelson Hospital.