Light-up musical dresses, an Elsa doll that sings in 25 languages and Olaf sno-cones are just a few of the new . ... Related: 'Frozen' Elsa dress selling for $1,000 on eBay.

UK sales of all Frozen merchandise, from dressing up outfits to dolls and jigsaws, are put at £31m up until the week ending November 8, according to retail experts at The NPD Group.