Adoption     
  
 Couple from a circus go to an adoption agency, but  social workers are doubtful about their accommodation.
So they produce  photos of their 15 metre long caravan, the back half of which is a beautifully  equipped nursery.
The social workers then are doubtful about the  education that would be provided.
"We'll employ an Oxford don who'll  teach the child all the subjects along with Mandarin and ICT  skills".
There are then doubts expressed about the child’s healthy  upbringing.
"Our full time nanny is an expert in paediatric welfare and  diet", they reply.
So the social workers are finally satisfied, and ask  what age of child they were looking for.
"It doesn't really matter", they  say, "so long as he fits in the cannon".