I've been doing this with my kids. It's been so enjoyable, we're all getting a lot of joy out of it. My youngest became obsessed with Totoro when she was 4 and I think I enjoy it more every time we watch it. Waiting a while before I show them spirited away, Ponyo spooked her first time round, but a year later and she loved it. There's a lot to process in some of them for small kiddos, so like most everyone else says, those two are probably the best ones to start with.