"...Because realism is obviously a huge concern in a movie with a talking snowman and a girl who can build an ice castle with a few sweeping hand gestures."
(slight spoilers, if you somehow haven't already seen this movie)
http://www.huffingtonpost.com/kara-wahlgren/for-the-love-of-olaf-can-we-stop-dissecting-frozen_b_4893806.html?fb_action_ids=839479336068359&fb_action_types=og.likes&fb_source=other_multiline&action_object_map=[305737529574301]&action_type_map=[%22og.likes%22]&action_ref_map=[]