Spot the difference is a game where you have to look closely at two images side by side and try to find and mark the differences between the two. For example one image may show a picture of a beach in summer and the other image may show the same picture but in autumn. You need to look closely at both images and try to find any changes, such as leaves on the trees, colors of objects, or differences in the weather. Once you find the differences, you mark them so that you can keep track of them.