Thanks...yes, i think they're pretty cute too. That's one of my girls as my avatar. I'd love to get some mandarins, but all I've got are my call ducks.....and my chickens....and my guineas.
I'd leave them alone for a couple of days...let them get used to their new pen. Feed and water them and talk to them while you're doing that, but don't try and force contact on them. I'm sure you are stressing them out with everything being new to them. I've had mine for years and they don't...