How about a customized sticker book? You could fill it up with various stickers and decorations, and even print out some unique designs of your own that reflect your friend's tastes. This gift is both practical and thoughtful, as it will allow your friend to display and organize their collection in a personalized way. You could also consider buying some limited edition or rare trading cards that they do not already have in their collection. This will not only add to their collection but also show that you took the time to find something special for them.
Or you can get her/him a star map with the date when she/he was born.
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.