How do I describe "quark".... It's like cottage-cheese without being cheese, it's creamy instead of grainy and I think it is a foreproduct of cheese - but like very, VERY early in the cheesemaking-process.
Ah, well, look here, wiki knows all :-D Wikilink (http://en.wikipedia.org/wiki/Quark_%28cheese%29)

And Activia is from Danone, which is originally a French company with branches all over. Just being nitpicky ;-)