How about booking him a tandem skydiving experience on his birthday? Many companies offer these experiences and they typically include a professional instructor to guide them through the jump. Alternatively, you could give him a skydiving lesson with a certified instructor or a gift certificate towards skydiving lessons. Another option is to get him a book on skydiving or a personalized skydiving photo album for him to keep his memories from the sport in one place.
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.