Or "Sentimental stories with child authors"

or

A Child's Tender Tale

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Note added at 4 hrs (2016-01-22 18:39:40 GMT)
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I did like Ana's idea of

young authors

or perhaps something like 'From the Mouths of Babes: Tender Tales by Little Storytellers'

As the first suggestion may remind some of the comedy 'Look Who's Talking' (and it's sequel, Look Who's Talking Now), this may be an especially good option, or perhaps mixing-and-matching between the two may produce an even better one.

Suerte, Lydianette y saludos desde las islas Marianas :-)

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Note added at 13 hrs (2016-01-23 04:00:20 GMT)
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The phrase 'from the mouths of babes' is suggestive of the (contextually appropriate) idiom 'out of the mouth of babes', commonly understood as referring to the way in which children can sometimes surprise us with their wisdom (as seen in the definition below).

'Out of the mouths of babes (and sucklings)'
Literary saying. Said when a child says something that surpises you because it seems very wise.
http://dictionary.cambridge.org/us/dictionary/english/out-of...

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Note added at 14 hrs (2016-01-23 04:24:32 GMT)
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Not to undone in contextually appropriacy, the phrase 'look who's writing' is suggestive of the film (and its two sequels) 'Look Who's Talking' (1989), which is about a newborn baby whose witty comments on mom and dad are heard through the voice-over of Bruce Willis.

'Look Who's Talking' (1989)
http://m.imdb.com/title/tt0097778/plotsummary

'Look Who's Talking Too' (1990)
http://m.imdb.com/title/tt0100050/plotsummary

'Look Who's Talking Now' (1993)
http://m.imdb.com/title/tt0107438/plotsummary

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Note added at 14 hrs (2016-01-23 04:26:52 GMT)
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Excuse me: that's 'Not to be outdone...'

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Note added at 1 day15 mins (2016-01-23 14:22:46 GMT)
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historias con tenura >>> heart-warming stories

And that should read: 'Not to be outdone in contextual appropriacy, the phrase...'

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Note added at 1 day50 mins (2016-01-23 14:57:43 GMT)
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What appears before the colon (in both suggestions above) should be considered only to the extent that a slight addition, in this context, might be deemed appropriate; pues, con lo que aparece después, en realidad, basta y sobra:

Heart-Warming Stories by Child Authors

or

Tender Tales by Little Storytellers