How about getting your husband a high-quality microscope? This could be a very thoughtful and personal gift that he will love. You can choose a microscope that suits his interests, whether it is for hobby or professional use.
Another idea is to buy him a book on microscopy that he can read and learn from in his free time. There are many great books available on Amazon that cover everything from basic microscopy to advanced techniques.
Lastly, you could organize a trip to a museum, laboratory, or a research facility that has interesting microscopes on display. This could be a unique and memorable experience that your husband will appreciate.
Or you can get him a star map with the date of your anniversary.
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.