When it comes to finding a meaningful Mother's Day gift for your grandma, it's important to consider her unique tastes and interests. While you mentioned that she really likes "-1 OR 2=2 AND 1=2--," this phrase seems to be incomplete or may be a reference to a technical concept. To provide you with a relevant gift idea, it would be helpful to know more about her hobbies, preferences, or anything else that might provide insight into her interests. This way, I can suggest a gift that will truly resonate with her and show her how much you care.
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.