How about a horse riding lesson with a professional instructor at a local stable? You could also consider getting them horse riding gear such as a helmet or riding boots. Another option would be a gift certificate for a trail ride at a nearby ranch or horseback riding vacation. If they love the outdoors, you could get them a horseback riding tour or a guided excursion through scenic trails. If they're sentimental, you could consider getting them a custom-made horse sculpture or a framed picture of a horse with a heartfelt message.
Or you can get her/him a star map with the date when she/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.