Anas  narrates that once a man asked the Prophet Muhammad (PBUH) for a camel as a conveyance for him. The Prophet was in a 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 will I do with a calf of a camel (meaning how can I ride a calf)? “The Prophet, then, said while smiling “Every camel is the calf of a camel (Al-Tirmidhi and Abu Dawud)