Hi everyone

We got given 2 baby chicks by DD's daycare a few weeks ago, so I thought I'd join this thread, as I have never had chickens before and don't really know what to do.
They are living inside the house at the moment while we build them an outside coop.

I have a few questions:
1) At what age can you tell a hen from a rooster?
2) At what age do they start growing feathers?

I know that they won't be laying any eggs for a while yet...