puerility       
noun [ U ]  disapproving uk/pjʊəˈrɪl.ə.ti/ us/pjuː.əˈrɪl.ə.t̬i/
 幼稚|犯傻
the quality of being silly in a way that a child would enjoy, not an adult
  The plot of the film is just a platform for puerility. 这个电影情节就是故事里的人物在犯傻。 
 They exhibit the puerility of naughty schoolboys. 他们展示了淘气的学校男生的傻劲儿。 
 See: puerile
 - More examples
 - Her taste for puerility is accommodated on her TV comedy program.
 - In their drawings, they can lapse into sensational puerility.
 - The show is a triumph of spectacle and puerility.