to use something in place of something else

[Margherita]

Hi, it's me again, Margherita! How can I turn into English the following sencentence: MIO FIGLIO CONFONDE IL MIO TORACE CON UNA CULLA.
That is, my sun is almost 2-month old and he use to sleeping on my chest instead of sleeping in the crib. So, is it correct to say that "my sun takes my chest for a crib"?
Thanks for your help
ciao
margherita

[Alan]

Hi,

Use something as something else, I would suggest.

Alan
_________________
English as a Second Language
You can read my ESL story Well, Hello!

[Margherita]

thanks Alan, your suggestions are always useful to me.
Finally, I can see you.
ciao
margherita