How about a personalized train set? You could pick out a train set that he does not already have or one that would complement his collection. You could also have some cars or train station pieces personalized with his name or a special message. Another idea could be taking him on a train ride or booking a stay at a train-themed bed and breakfast. This would give him the chance to indulge in his love of trains and create special memories with you.
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.