How about a mushroom foraging kit? You could include a book on edible mushrooms, a basket to collect them in, and maybe a pocket guide to identify mushrooms in the wild. You could also consider gifting a membership to a local mycological society or organizing a guided mushroom hunt together. Another idea could be a personalized mushroom carving or painting, or a cute mushroom-shaped mug or ornament.
Or you can get her/him a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.