The ceiling in Grand Central Terminal is just amazing, I do not envy the poor artists who had to paint it though.
We then headed up 5th Avenue towards FAO Schwarz, stopping for 5 minutes to watch the Salvation Army guys dancing to 1D, they were so so good. You can see a video of them here.
No trip to FAO Schwarz would have been complete without a go on Zoltar, best $1 I spent ha. The lego statues were pretty impressive too!