Picking-up toys

I was on the phone when Aiden began talking to himself. He said something to the point of, "I have my bristle blocks out, but I want to play with my Little People. I need to put away my bristle blocks before I take out my Little People." Without any help, he cleaned up his toys and got out the new set. I switched toys again about 15 minutes later. I was amazed and so impressed. Great parenting or fluke? A little of both? :-P