childlike
adjective \ˈchī(-ə)l(d)-ˌlīk\
“ resembling or suggesting a child : like that of a child; especially : having or showing the pleasing qualities (such as innocence) that children often have”
Examples:
- We gazed at it in childlike wonder.
- She took a childlike glee in describing every detail.
- a grown woman with a childlike face