儿化音 erhuayin is very common in the speech varieties of North China, especially in the Beijing dialect, as a diminutive suffix for nouns, though some dialects also use it for other grammatical purposes. Here are some examples:

1. 老头儿Lǎotóur，an old man;
2. 大婶儿dàshěnr，an old aunt;
3. 小孩儿xiǎo háir, a little child;
4. 男孩儿nánháir，a boy;
5. 女孩儿nǚháir, a girl;
6. 水饺儿shuǐjiǎor，dumplings;
7. 锅贴儿guōtiēr，pot-sticker;
8. 豆汁儿dòuzhīr; a fermented drink made from ground beans;
9. 冰棍儿bīnggùnr，popsicle
10. 一根儿冰棍儿Yī gēn er bīnggùnr, a popsicle;
11. 汽水儿qìshuǐr, soda;
12. 一瓶儿汽水儿Yī píngr qìshuǐr, a bottle of soda;
13. 公园儿 gōngyuánr，park;
14. 鲜花儿xiānhuār; flowers;
15. 知了儿zhīliǎor, cicadas;
16. 小牛儿xiǎoniúr, calf;
17. 小说儿xiǎoshuōr, novel.

You can find more information here: http://en.wikipedia.org/wiki/Erhua You can find more examples here: http://carlgene.com/blog/2013/02/128-common-erhuayin-words-in-mandarin/ https://sites.google.com/site/tejastrolley/home-1/2

Thank you!