A great gift for your friend who loves science experiments would be a Science Experiment Kit. There are a lot of different options available online or in stores. You could also get a book about DIY experiments or projects they can do at home. Additionally, you could get them a gift card to a local science museum or a subscription to a science magazine like Discover or Scientific American. These gifts will allow them to continue to explore and learn about their passion for science in a hands-on way.
Or you can get her/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.