How about getting her a lock pick set with some unique and challenging locks to practice on? There are various sets available online with different levels of difficulty and you can even find instructional books or videos to help her improve her skills.
Another idea could be a lock picking class or workshop. Check to see if any local locksmiths or hobby shops offer classes in your area.
If your wife is interested in the history of lock picking, you could also consider giving her a book or documentary on the subject. Additionally, you could consider surprising her with a security padlock that she can practice picking on, or a shadow box to display her lock pick set in.
Or you can get her 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.