Hmm mixed answer, yes she does scatter the entire toy basket over the games room too, but at the moment is better at agreeing and volunteering to pick stuff up than her 5 yr old sister. I think it's since I organised their play room properly and I now have most of their toys put in boxes and bags and they can only have one out at a time. If they want another one they have to pack it up and give it to me to put back up on the shelf.
I now have a picking up nutter! She is very anal about picking up the game/box of toys, even before her sister is finished -a squabble ensues-and if I say 'thankyou, leave it there I'll put it up in a minute I have wet hands" she gets very upset and insists that i put it away now.
So result of all this is? It's great, but causing a few problems..

and I'm not expecting it to last. I think they can start to help, but need the right motivation. I continue to encourage her even if her intentions get a bit skewed at times..she is only 2!
When I ask her sister to pick up toys I get either of these.."but I'm tired" "I can't hear you, my ears don't work" or 'but I didn't leave it there" or "that's not my toy" or "what do I get if I do?".
I find a box of toys confiscated works a treat with that age group. Then you just threaten to "clean up if they won't" and they know it means it'll disappear for a while, or sometimes for good.
Sorry about the ramble, hope something helps..
Em