How about a hiking day trip where you both spend quality time together in nature? You can plan a route on a trail or in a national park that he hasn't visited before or that he's always wanted to see, and make sure to pack some energy-boosting snacks and plenty of water for the hike. Additionally, you could get him a quality pair of hiking boots or a new backpack for his hiking trips.
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.