For this project, first grade students had been studying space and needed a way to present what they learned. I used http://animoto.com/ with them to make movies about space. At six and seven years old the students weren't able to browse and choose images so I created a template for each student. It was then up to them to fill in the text to describe each image. As a final fun project we used http://www.photofunia.com/ and Mac's Photo Booth to make astronaut pictures of each student for the end of their movies. The kids had a ball watching their movies and showing everyone what they learned.
Here's a sample of an astronaut picture.
And here's one of the final movies.