First you need to get your hands on a Discovery Kids Night Vision Camcorder. I got mine at a surplus store just after Christmas, it originally came from Costco. At the time of writing they have it half price ($35) at www.discoverystore.com
. Insert batteries and turn it on, check that when you turn on the camera lights, two white LED's on the front of the camera turn on. If white LED's do not turn on, it is possible your unit is truly configured for IR night vision, and you do not need to follow this instructable.
You will also need an SD memory card. Although the camera has a small amount of internal memory, it seems that you can only transfer pictures to a computer if you have a memory card installed. Even a small one will do, with 1GB you can store more than 1000 pictures or 1 hour of video.
Update: When I checked Feb. 6, 2010 the camera was no longer half price at discoverystore.com.
Here is another option if you can't get the Discovery Kids camera cheaply, or if you don't want to modify a camera: