Come and see the laboratories, and try our liquid Nitrogen ice cream at the NPL Open Evening on 20 May! http://tinyurl.com/33k4tyc

Oh great! I went there as a teenager. I didn't realise they do Open Evenings. I know some teenagers who will be interested.

The ice cream was the best (especially the stuff I made), and the sorbet was excellent too! Extremely tired after 13 hours on the go, but it was worth it, with many happy visitors (~700 during the day, and over 1700 during the evening)