Edinburgh experiences for a gift?

I live in Edinburgh but my Mum doesn't, and every year for Christmas I get my Mum a wee 'experience' in Edinburgh, which we do together when she visits, and she loves it.

However this year I'm just absolutely out of ideas. We've done afternoon tea to death, visited the castle, the museums, Mary King's Close, the Chocolatarium, wine tastings, whisky tastings, cooking classes, spa days, you name it.

Any help?