Wake up the kids and send them to bed because you will want this whole day to download and play the Ni No Kuni demo currently available on that new, fancified PSN store.
We have had a few posts about this game in the past, so if you need to get up to speed, check out this link or just look at this video:
[youtube http://www.youtube.com/watch?v=0mrgKrS5VuE&w=760]