"Kidults" is a silly term, and feels like another baseless attack implying that younger generations shouldn't enjoy life and should instead be productive. My grandparents would get together with their friends and play card games well into old age (I wonder at what age they learned those games?). My parents' generation (the baby boomers) seem to still enjoy movies, national sports, TV, and other leisure activities of their generation. There is nothing wrong with anyone enjoying leisure activities, and humanity has probably done so since the earliest of times.