One idea could be to get him a trivia game book with questions about his favorite topics or subjects. There are also personalized trivia game sets available where you can customize the questions based on his interests. Another option could be to give him a subscription to a trivia magazine or website so he can receive regular updates on new questions and topics. Finally, you could also consider getting him a board game like Trivial Pursuit or Jeopardy that he can play with family or friends.
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.