Animoto is another simple program online to create simple videos from pictures, sound, text, and existing video clips try Animoto. Animoto makes it possible to quickly create a video using still images, music, and text. In the last year Animoto has added the option to include video clips in your videos too. 
If you can make a slideshow presentation, you can make a video using Animoto.
Animoto’s free service limits you to 30 second videos. You can create longer videos if you apply for an education account. I like to use Animoto early in the school year to introduce my new students to some of the basic skills that will be carried across to more complex video creation later in the year.