Prophet Muhammad (peace be upon Him) was in jolly mood, so He said, "Yes i will give you, but a calf (baby camel).
That person could not understand and got surprised and said, "O messenger of Allah! what I will do with a calf of a camel?" (means how can i ride a calf).
Prophet Muhammad (peace be upon Him) said "Every camel is the calf of a camel (means even after getting matured for riding, it remains a child of camel)
(Tirmizi, Abo Dawood)