Our son got a big cool room, and our daughter got a slightly smaller room because she was a test-tube baby so we had spent part of her budget just getting her born.

WSJ: Penn Jillette: I Child-Proofed the 'Slammer' | House Call

The 19-year-old from Borehamwood, Hertfordshire, understands why working on the Tube was not just a job for Mr Robinson.

BBC: London