Five Star Gift Ideas

How about a terrarium building kit that includes everything he needs to create his own terrarium? You could also consider a book on terrarium building with creative ideas and techniques for him to explore. Another option could be to purchase some unique and interesting plants for him to use in his terrarium, or a subscription to a monthly plant delivery service so he can collect new plants for his terrarium over time. Finally, if there's a particular type of terrarium plant he's especially fond of and you happen to be able to grow it yourself, you could consider planting it for him as a meaningful and personalized gift.

Or you can get him a star map with the date when he welcomed you in this world.

Leticia Hooper says about Under Lucky Stars star maps:

“It was so beautiful. My dad loved it. It arrived quickly and wrapped up so nicely. Highly recommend.”