What are they talking about?

A friend of mine posted this in her Facebook, and I had to bring it here since is is really amazing.

Take a look at the conversation between these two twins:

So, what they are talking about?

New refrigerator technology?
World peace?
How to trick Mom and Dad?
or maybe just imitating grown-ups?

I can't say that I really know, but they seem to be getting to a good understanding between themselves.....