I wonder if this trend of "Kidults" (as in adults buying toys or having other very "child-like" hobbies and preferences) is fueled by how little pathways to joy we leave to adults so many revert back to when Ninja Turtles made them happy.
@tante Jellycat is very popular with adults in China. Chinese family attribute it to kids being overworked in school and not having enough time to enjoy kid stuff in general.