子供のように素直だの英語

(as) simple as a child

as innocent as a baby

A deformed child is all the dearer to its parents.

A dunce is all the dearer to his parent.

being both innocent and sweet

It is a doll-like child―a cherub.

to fret

a pretty little child

Nothing is sweeter than a child.

a cute kid with pigtails

a mischievous but lovable child

an angel of a child

one's dear child

affectionate children

being lovely and charming because of one's youthfulness and beauty

I am brimming with curiosity like that kid.

The child prattles prettily.

Why are kids so cute, I wonder?

The children are in robust health.

Isn't he a fine big man?

He is a cute baby that looks like you.

a beautiful child

children are precious

You have fine children.

the small and lovely hand of a child

If you make too much of your child, it gets spoilt

You should [must] be proud of your son.

a cute little baby

a very cute child

That's a good boy.