- Nobby Ball 225mm$6.95The 225mm diameter Nobby ball is semi transparent and comes in a range of assorted Colours. It is a great ball to use to teach young children how to catch as it is big and easy for them to grip because of the nobbs or bumps on the ball. It is reasonably strong and could also be used as a back massage ball. It is also easy to inflate. Australian Made. Suitable for 6 months and up.