Airworld Aviation Museum
Thom loved it!It is one of the very few museums where you can actually get into the exhibits. We sat in a Vampire and a helicopter, Thom wanted to 'blast off' and advised us to 'hold on tight!'.
There are both aircraft and memorabilia there, with a bits from both world wars, and a section about the royal observer corps. Plus some search and rescue as that is based next door.
The place hasn't really changed since the last time we were there (2010), the modern simulator is powered by sun Sparc station 40, I used to run a second hand Sun ultras-arc 50 in 2008! Nevertheless I would recommend it! It is a really interesting place right next door to Caernarfon airfield where the air ambulance and mountain rescue are based.