How about getting your dad a subscription to a documentary streaming service such as CuriosityStream or DocPlay? This way, he can access a wide range of documentaries on various topics anytime he wants. You can also consider getting him a few DVDs of his favourite documentaries or a book on the making of a documentary that he enjoyed. Additionally, if your dad is interested in history, you could get him a virtual tour of a historical site or a museum that he has talked about visiting.
Or you can get him a star map with the date when he welcomed you in this world.
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.