childlike

adjective2

1. •
   Innocent and trustful; credulous; artless.

   • According to the prevailing Danish rationale, Greenlanders were naïve and childlike, in need of protection and incapable of governing themselves. — 2019
2. •
   Of, like, or suitable for a child.

   • Even Mario is given childlike mannerisms – running open-armed like a fearless toddler, whooping with delight – to convey playful innocence. — 2019