One other thing I should say about Frozen is that it seems that Disney has....kind of grown up. The film moves away from a lot of the past stereotypes, most prominently "romantic love conquers all and falling for a guy you just met and marrying him within hours is A-OK because it's true love". It lampshades a lot of the past common Disney tropes while also pointing out some of their flaws (though I shouldn't go into more detail, as that would spoil what might be the biggest twist in any Disney animated film), and puts more emphasis on familial love and friendship over romantic love.
It's actually kind of mature for something that at first seemed like nothing but another Disneyfied fairy tale.