How do you say

I plan to take the train for a trip next month.

..in Chinese?

我打算下个月坐火车去旅行。

wǒ dǎ suàn xià gè yuè zuò huǒ chē qù lǚ xíng 。

How do you say "The baby is three months old, and I want to buy wooden furniture." in Chinese?