Let's have a feast!

IZ: mommy, let's have a feast
Me: huh (hungry at this hour? another growth spurt?)
IZ: let's have a feast
Me: what do you mean? (pineapple tarts? nutella bread again?)
IZ: it means let's have a talk
Me: ah.. talk..

I wonder why feast = talk...

Guess what he wanted to talk about?

IZ: why the grandfather's clock has chain?