How about a documentary film festival pass? This way he can choose which films he wants to see and attend a variety of screenings. You could also give him a subscription to a streaming service that specializes in documentaries, such as CuriosityStream. Additionally, you could put together a themed documentary marathon evening with snacks and drinks, featuring some of his favorite films or new releases. Finally, consider purchasing a book about the making of his favorite documentary, or a coffee table book filled with stills and information about documentaries in general.
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.