childish

US /ˈtʃaɪl.dɪʃ/
UK /ˈtʃaɪl.dɪʃ/
"childish" picture
1.

幼稚的, 孩子气的

of, like, or appropriate to a child

:
She has a very childish handwriting.
她的字迹很稚嫩
His behavior was quite childish for his age.
他的行为对于他的年龄来说相当幼稚