If you want to make some cute videos very easily, I recommend Animoto http://animoto.com/ It's fun and has a good choice of templates. They have music you can use, or you can upload your own MP3 music. Your have to pay $30 a year and can use the site as many times as you want. (Tip: if you don't like how it goes together, just tell it to do it again and you will get a different version.)
Here is a sample of a video I made for Mormon Helping Hands using Animoto.
For those who may want to do more than just basic editing, I recommend Sony’s Vegas Movie Studio
Platinum Suite 12 for just $40.81 (as of 2/05/13) here. It’s simple, stable, and can do many wonderful things. It is amazing for the price. I use its professional big brother, Sony Vegas Pro.