Like a baby; childish; puerile; simple.(adjective)
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Use "babyish" in a sentence
"But I suppose a boy thinks he is called babyish, if the name is fastened on him."
"I like this baby bedding set at Overstock.com but it's not very 'babyish' in the sense of bunnies, teddy bears, bouncing frogs and whatnot."
"Sometimes it's a situation like Disney, where the book has been turned into a cartoon that is viewed as "babyish;" sometimes it's a book like The Sisterhood of the Traveling Pants, where parents think that because the movie is OK for their child, so too are the books."