Children (and most adults) love looking at themselves on a webcam and this flash based site lets you add over 70 filters and effects. Use the snapshot button to grab an image. There are lots of ways to use this tool in class. Use the mirror functions in maths for symmetry and compile a music video by adding a screencast tool.
http://ictmagic.wikispaces.com/Photos+%26+Images
This is a wonderful citizen science project where users are asked to classify animals on the Serengeti from camera traps to help real scientists survey and track populations of important and endangered wildlife.
http://ictmagic.wikispaces.com/Science