Alnwick Castle is a great place to spend the day - for young and old.
As well as an incredibly historic castle and grounds to explore there are usually plenty of activities for children (and adults) from dressing up as a medieval knight or maiden in distress, to learning how to use a sword, making wands, and learning how to ride a broom stick like Harry Potter.
Sometimes they put on shows (see photo) that are very entertaining for all the family.
Check out if the Castle is open and what's on at their website.