How about a watercolor set or an art kit filled with watercolor paints, paper, brushes, and other supplies? You could also consider a book on watercolor techniques or a gift card to an art supply store. If you want to make it even more special, you could include a custom watercolor painting of something he loves or a painting of the two of you together.
Or you can get him a star map with the date when he was born.
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.