As the title suggests. Travelling with a 15 and a 12 year old. Looking for somewhere not too far (as only 3 nights), and not too major (don't want to take on a Rome or a Paris just for a couple of days). Just a nice city with some fun things to do and see, and nice food. Don't care much about weather - not sun seeking. Front runner so far is Copenhagen, but had a look on Expedia (admittedly quite briefly) and direct flights plus a nice-ish hotel was nearly two grand! So ideally somewhere a bit cheaper (or any tips for where to book cheaper last minute deals?). All ideas welcome, including less well known cities.