How about getting your grandpa a theater or concert subscription for the year? This way, he can attend multiple performances throughout the year and enjoy his favorite performances without worrying about the cost. Alternatively, you could opt for getting him tickets to a performance or concert that he has been looking forward to seeing. Another great idea could be a nice meal at a restaurant near the venue, or perhaps gift card for a relaxing massage after the show. I hope this helps!
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.