How about getting him a trivia game subscription box? There are many subscription services out there that offer monthly trivia games delivered right to your doorstep. This way he can play new games every month and keep building his knowledge. Another idea could be to create a custom trivia game just for him, with questions that are related to his favorite topics or personal interests. You could even invite his friends over for a trivia night to make it more fun and interactive.
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.