Went for a week’s holiday in Yorkshire in 2014 when my daughters were ten and seven years old!
We stayed on a working farm that rents out a separate farm house about half an hours drive from York. Was great cos my two got to help herd sheep etc which they loved.
We spent two days in York itself (the rail museum is much more fun than you’d expect, honestly) did yorvick twice (as well as the ride there are archaeologists who love chatting to history nerd kids). City walls are fun to walk and there are a million places to have a nice coffee /hot chocolate. Climbing the Minster tower is great too.
Also spent a day in whitby which is just a brilliant town to hang out in and again loads of great places to eat and drink. Did Fontaines Abbey too, also fab.
Loved it so much we haven’t been outside the UK for our holiday since 10/10