Childly
ahd-5
adjective.
Childlike.
The Century Dictionary and Cyclopedia
Like a child; childlike; acquired or learned when a child.
the GNU version of the Collaborative International Dictionary of English
adjective.
Having the character of a child; belonging, or appropriate, to a child.
adverb.
Like a child.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
Of or pertaining to a young child;
childlike
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
befitting a young child
Equivalent
immature
young