Having a license with you when on holiday - I've had some great 'trial introductory flights' by showing the instructor my license when booking something at the local airport. It seems to turn the flight into an exploration of the local area rather than an an intro to what a C152 can ( or can't)
Some highlights (with a UK license)
* Hands on in a Stearman
* Orbits of the Statue of Liberty
* Valley Flying near Wellington
D.