As a child growing up in the sixties we didn't watch much TV but there was BBC's Play School (look it up if you're under 45!) and a part of each programme was to "go through" one of the three windows (arch, circle and square) and hear a story or watch a short film about the "real world". My favourite episodes were when the film was about visiting a factory and earlier this week I recaptured that excited childhood feeling when we visited the factory in Merseyside where our SIPs (Structural Integrated Panels) are being manufactured.