Explaining THRUST to a youngster

Recently took the young lad to Cosford Airshow and he was overwhelmed by the power and the noise of the Typhoon and the Vulcan, But he asked me a question today about THRUST and how they determine the THRUST figure of an engine, both JET and PROP, So what reference (if poss)could i use to demonstrate just how much thrust the likes of the Typhoon generates. ie a simple household fan(for want of a better comparison) may generate say a pound of thrust, so it would be a stark comparison to the might of the typhoon……………I reallyh hope the above makes some sense 😮