Space Hopper on wikipedia.org

you could sit on it,and bounce around,had handles like 2 horns at the top,came in all different colours. please find it-thanks Big Orange ball you sat on and grabbed it's horns before you go bouncing off on it! WHOO HOO! A big rubber ball that you could sit on. It had a head with ears to hold onto as you bounced around the playground. Available in any colour as long as it was bright orange.