What's the difference between childish and whimling?

Childish

Definition:

(a.) Of, pertaining to, befitting, or resembling, a child.
(a.) Puerile; trifling; weak.

Example Sentences:

(1) Fundamental differences between childish and schizophrenic ways of interpreting the world will be presented, showing the specificity of cognitive representation in schizophrenic thinking.
(2) The childish vulnerability she brings out in Sara balances out the visual bleakness of the film.
(3) [De Boer-Buquicchio] meant sexualised depictions of childish looking characters in manga and anime.
(4) "Hopefully, the lesson is to stop this foolish childishness," McCain said Thursday on CNN.
(5) If that sounded childish, Waugh's writing was valued by good judges.
(6) Against my will I had to keep watching those two black companions who persistently marked out our movements ahead of us, like walking silhouettes, and it gave me – our feelings are sometimes so childish – a certain reassurance to see that my shadow was longer, slimmer, I almost said "better-looking", than the short, stout shadow of my companion.
(7) A letter in which Albert Einstein branded religious beliefs as "childish superstitions" and the "product of human weaknesses" has been sold at auction in London for £170,000 to a private collector, smashing the world record for a letter by the great scientist.
(8) It was fairly childish, but it made me laugh.” Attenborough also talks about the dangers of climate change ahead of a new documentary to be shown over the festive period, 60 years after he first scuba dived the Great Barrier Reef in 1957.
(9) And it's important to understand the difference between being childlike and being childish.
(10) "Or like a small dog barking — it's so childish."
(11) (Though my childish understanding, informed by the culture I lived in, led me to believe that "cousin" was the operative problem there.)
(12) Mollie Whitworth North Walsham, Norfolk • What an impressive change the House of Lords debate on tax credit regulations made to the usual childish Punch and Judy politics of the other house.
(13) Once in charge, they believe they are done with such childish things, and can’t conceive of circumstances in which they will be judged – especially when convinced of their own rectitude.
(14) It is a mark of a life unlived, of a childish world view retained.
(15) This campaign is nothing but a self-interested and cynical ploy by the newspaper, a childish way of hitting back at the growing chorus of anti-Page 3 voices .
(16) What sense would there have been sealing up the Da Vinci, unless you get into childish Dan Brown logic?"
(17) The sale will be watched carefully because a letter in which he branded religious beliefs as "childish superstitions" and the "product of human weaknesses" that went on sale in May smashed the record for an Einstein letter by fetching £170,000.
(18) This was “childish back and forth”, charged New Jersey governor Chris Christie .
(19) It's a rare interlude of childish exuberance for girls whose young lives are dominated by the twice daily walk to the well and home, carrying heavy water cans, and other domestic chores.
(20) Those who don't suffer from them find them mystifying; childish, even.