If you are excited about it and gladly read this books, chances are little one will too. You can make kids think X is cool easily. Mostly talk positively about X.

However, with the main hobby, at age of 8, peer pressure does a lot. And so does wish to be individuality. So your kid will like dinosaurs and debates about them with you, but to can't make it super obsessed or something. You can't make kid into copy of you and it would be harmful anyway.