Possible long-term engagement: 3-D, animated images of animals and humans

I need 3-D backgrounds, humans and animal characters for a mobile game, similar to the humans and animals on HayDay. You need to produce 4 human characters, 15 cute animals and 5 different backgrounds. All of them to be 3-D and the humans and animals have to be 3-D animations. Please go and look at HayDay for Android, for an idea of the characters and backgrounds I need. *You will need to send one (1) example of a 3-D animated animal character with your proposal and 1 background with your quote. No quote will be accepted without an example of your work as an animated image.. This is specified below.* All images and animations need to be your OWN work and without copyright of any sort. You have to provide them to me in industry-standard formats, such as PNG, JPEG or GIFs. This HAS to be original - in other words, this HAS to be your OWN, ORIGINAL WORK, and you have to cede all copyright and IP to us. So once you deliver the project, the images and animations become our property. Please include in your quote an example of RELEVANT work of your OWN - an animated image of, for example, a cute elephant walking on a background of grass with trees. I won't accept any proposal unless you include an animated image as per this request. Must be your own, original work. We will not utilize your sample, but we do require a 3-D example of your work. We will not accept somebody else's work as an example of yours. I will NOT make an upfront payment for your example, so please don't ask me for an upfront payment. This has to be YOUR work, not copied from some site. This is a long-term engagement. I may ask you to create multiple characters for the game. So although the initial appointment may be for a relatively small amount, in the long term this may be a much bigger assignment, depending upon how you perform. I will ask you to sign an NDA (non-disclosure agreement). All work has to be your own and we will not accept non-original work or images. Please send me a Word document as a proposal, containing the example of the work above, else I will not consider your proposal.