Hope this is in the right part of the forum...

I was just wondering when babies start dreaming? Or hasn't science proven it yet? And what would they dream about?

Like, as soon as they are born do they dream? Or does it have to develop over time. Can foetus' dream?-obviously I mean when they are fully formed just before they are born. Or does a human have to have interactions with the world before they dream? This is probably a realy stupid question, but yeh...I was curious! I'm sure someone must know what with REM and all that you'd be able to tell if a baby is dreaming right? I dunno...I don't have kids.