When my husband and I first started dating, we agreed to learn something new together as our anniversary gift. I'm not really into jewelry (don't even wear my engagement ring anymore, just my wedding band) and we have more than enough stuff in our lives. I didn't want to fall into the rut for going out for a 'nice' dinner once a year, it seemed too routine and not really personal. So, we take a class, or try something new for our anniversary. We've done a lot of different things over the years, like a couple's massage class, wine tastings, cooking classes, walking tours in Boston. We are both big outdoor enthusiasts, so the last few years have focused on that. Things like map and compass navigation, rock climbing, sea kayaking, wilderness survival, etc.
And if they're aren't formal classes available, I'm sure you could put together a DIY learning project. YouTube tutorials, books from the library, etc. You could design a meal plan for a Thai dinner and pick out the ingredients and find authentic recipes online and cook together. You could do a beer or wine tasting at home, or invite another couple over and make it an event, complete with notecards for tasting notes. A picnic and a study of the celestial sky, learning the constellations together? The sky's the limit! (har har)
I think continuing to learn and grow together in an intentional way is a very good investment in one's relationships.
