Barring cultural factors I'm unaware of, I agree it's an attempt to look cute. The comments of 'kawaii!' suggest it's being received that way by Japanese people, too. More specifically, she's doing what children do when sitting down with nothing specific to do, but still feeling content and keeping themselves mentally occupied. I'd think the makers were aiming for 'young and carefree'. Like a child waiting for Father Christmas.
Last edited by roseblood on 22 Oct 2010, 8:15 am, edited 1 time in total.