3 sentences

1. 那个小孩在院子里高兴地骑着三轮车。

   nà​ge xiǎo​hái zài yuàn​zi lǐ gāo​xìng de qí zhe sān​lún​chē.

   The child is happily riding a tricycle in the yard.

   Source: Dong Chinese Dictionary

2. 快递员脚登三轮车，在狭窄的胡同里熟练地穿行。

   kuài​dì​yuán jiǎo dēng sān​lún​chē, zài xiá​zhǎi de hú​tòng lǐ shú​liàn de chuān​xíng.

   The delivery man pedaled his tricycle, skillfully weaving through the narrow alleys.

   Source: Dong Chinese Dictionary

3. 游客们坐在三轮车上欣赏北京胡同的风景。

   yóu​kè men zuò zài sān​lún​chē shàng xīn​shǎng Běi​jīng hú​tòng de fēng​jǐng.

   Tourists ride in pedicabs to enjoy the scenery of Beijing's hutongs.

   Source: Dong Chinese Dictionary