How about a racquetball racquet or a new set of racquetballs? A personalized racquetball that has your dad's name or a special message on it could also be a great gift. Another idea could be some racquetball shoes to wear while playing or even a customized water bottle to keep him hydrated during his games. Lastly, you could consider gifting him with a racquetball lesson or a session with a trainer to improve his game.
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.