legos are only okay to use as an adult when you use them with your children. there are hundreds of other adult hobbies that give you the same satisfaction that legos do. they are a children's toy. most things that fall under "hobbies" today (board gaming, miniatures, video games, comics, movies and music) are just consumer garbage and childish. but real hobbies (outdoors activities, working on some kind of vehicle, growing plants, reading for knowledge, working with animals, building real things with your hands) are viable and should certainly be chased by adults.
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