Create an animated demo video for website

Hello,
I need a one minute animated video demo for our website's home page.

The video demo has to tell the story of our product in an entertaining way. We need our concept explained in the most simple way possible, but at the same time enjoyable. The length of the demo has to be around 1 minute. So I need you to:

Create the script from my brief.
Record voice over track
Create the illustrations
Create the storyboard
Animate everything
Add all of the sounds effects
Then add music (If wanted)

In addition we want to be allowed revisions of the script and storyboard.The time frame can be anything up to 4 weeks.

Happy Bidding