What's Different

It was snowing outside one cold winter day and Nicole had gotten tired of playing computer games. She asked her Mom if there was something she could do. After thinking about it for a while her mother thought of a game called "What's Different". She gave Nicole a sheet of pictures. At first sight they all appeared to be identical, but they weren't. She told Nicole that one of the pictures was different from the rest. Can you help Nicole find the one that is different?