Your basic "it's what's on the inside that counts", moral-of-the-story story about a rabbit filled with self-loathing. 

<h3>Burrowing into 钻</h3>
Difficult bits in this passage include the phrase 钻出来 [pinyin]zuan1 chu1 lai2[/pinyin]. We know that 出来 means to "come out of". But 钻? If you check the dictionary, the first definition that comes up for this word is "diamond", but that wasn't the correct definition in this case. Secondly, it also means to "drill" or "bore", which makes sense as a second definition of "diamond" - lots of diamond drill bits out there. But that still doesn't work in context of the whole sentence. But if you run a Baidu image search on the phrase, and you'll find lots of pictures of people squeezing out of small spaces, children coming out of playground tunnels, workers coming out of manholes, and you'll probably realize that 钻出来 means to wiggle out of a space via a small opening. Imagine a secret agent crawling through an air duct; in Chinese, there's a word for that, and that word is 钻. So it's really more like "to burrow out of or in to". I often hear it used in Beijing in reference to "burrowing under the covers" (钻进被窝).

<h3>Sources</h3>
I got this story from Sina user <a href="http://blog.sina.com.cn/s/blog_6ace1efa0100kltk.html" target="_blank">Zifengling's personal blog</a>, in a post where she lists a few different easy stories, so if you wanna read some more on your own, head on over. I'll probably translate another couple from there before too long. 

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<h3>Chinese text</h3>
森林里住着一只小兔子，它叫“丑丑”。它的眼睛红红的，像一对红宝石。可是它的毛灰灰的，像是从灰炉里钻出来似的，它觉得自己太丑了，常常一个人躲在家里。

虽然它长得不好看，但是它有一颗无比善良的心。小猴子乐乐的家被大水冲垮了，无家可归。丑丑就让乐乐住在自己的家，还把自己最喜欢吃的巧克力分给乐乐吃。不仅如此，谁头痛、生病了，没钱买药，它都会尽其所能进行帮助。

日子一天天过去了，丑丑还是很孤单。一次，森林里最好看的小兔子美美来找它玩，可丑丑觉得自己太丑了，没脸见它。美美告诉丑丑：“人的外表并不重要，重要的是内在美。”丑丑恍然大悟，它跑了出去，和伙伴们一起尽情地玩耍。
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In the forest there lived a little rabbit whose name was "Chouchou". His eyes were red, like a pair of rubies. But his fur was grey, like he'd wiggled out of a furnace, and he felt himself to be very ugly, often hiding in his house alone. 

Although he wasn't nice to look at, he had an incomparably kind heart. When Little Monkey Lele's home was burst apart by a flood, he had no house to return to. Chouchou let Lele live with him, and he divided up his favorite chocolate to give some to Lele to eat. Not only that, whoever had a headach, or got sick, with no money to buy medicine, he did everything he was able to do to help. 

The days passed one by one, and Chouchou was still alone. One time, the forest's most beautiful rabbit Meimei came looking for Chouchou to play, but Chouchou thought of himself as just too ugly, he couldn't face seeing her. Meimei told Chouchou: "It's not what's on the outside that counts, the important thing is what's on the inside." Chouchou suddenly saw the light, he ran outside, and played with his friends to his heart's content.  
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