Rosie51
Loads of Harry Potter characters came up in my FB feed. Very few Elsa's this year but quite a few from the Dr Seuss books. Grandson with learning difficulties went as Thing 1, as it required the minimum of "altered" clothing. He was happy in red tshirt and joggers, and a bit of blue fringing 
I saw quite a few 'Things' this year - obviously a popular and not too expensive choice for many. My GS insisted on going to nursery as Spiderman - but mind you, he can rarely be parted from his Spiderman outfit anyway, so it certainly wasn't bought for the occasion. A friend's little GD had the most beautiful Hungry Caterpillar costume - she looked adorable in it.