Squirrels have been learning how to use an app on the iPads. Green screening is used in the movies to make it look like the actors have landed on an alien planet, and it’s used on TV to make it look like the weather man is standing in front of an animated weather map. The green screen effect works by combining images from multiple sources into a single video. These images can come from photos or videos in your camera roll, or from the live video camera. The children chose anywhere they would like to be and they took photographs of each other and combined the images .