How about gifting him a DIY cosmetics kit that includes all the necessary ingredients and tools. Or you can get him a subscription to a cosmetic chemistry magazine or book that he can read and learn more about this subject. Another great idea is to set up a tour of a cosmetic chemistry lab or facility, so he can see the process of creating cosmetics in action. You could also look into getting him some unique cosmetic chemistry-themed clothing or accessories like science lab coat or a periodic table tie.
Or you can get him a star map with the date when 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.