Mother and her son were flying with kulula.com from Johannesburg to Durban.
 
The son (who had been looking out the window) turned to his mother and
asked,  
'If big dogs have baby dogs and big cats have baby cats, why don't big
planes have
baby planes?'
 
The mother (who couldn't think of a quick answer) told her son to ask the
stewardess.
 
So the boy asked the stewardess, 'If big dogs have baby dogs and big cats
have baby
cats, why don't big planes have baby planes?'
   
The stewardess smiled sweetly and asked, 'Did your mommy tell you to ask
me?'
 
The boy said, 'Yes she did.'
 
'Well, then, tell your mommy that there are no baby planes, because
kulula.com always pulls out on time.  And you can ask your mommy to explain
that one to you!'