How about a DIY sandblasting kit? It could include a sandblaster gun, gloves, safety glasses, and different types of sandblasting media. This will allow him to create his own sandblasted designs on different surfaces, such as glass or metal, which could be personalized to celebrate your anniversary. You could also consider scheduling a sandblasting class for both of you to take together, followed by a romantic dinner or picnic to celebrate your anniversary.
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.