iMovie is a great app that allows you to create entertaining and informative videos right on your iPad. You can use a trailer to create a quick, slick video with a movie trailer feel. Or, you can start from scratch and use your video and images to create a fantastic Movie.
Here is a link to planning pages for your trailer.
Use these resources to find background music for your videos.
Bensound/Royalty Free Music
Purple Planet Royalty Free Music
Free Music Archive