How about a professional-grade charcoal drawing set? You could look for sets with different types of charcoal, pencils, erasers, and other supplies that would allow him to create a wide variety of artwork. You could even include a sketchbook or a set of high-quality drawing papers so he can experiment with different techniques and styles. Another idea is to commission a custom portrait of the two of you together in a charcoal drawing style. This could be a unique and thoughtful gift that he would cherish for years to come!
Or you can get 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.