DPNs come in all different lengths and sizes. You can get them in bamboo, wood, metal and even acrylic. Newer knitters may want to use wooden or bamboo needles, as there is less a chance of the yarn slipping off.
Here are some links so you can check out some of the DPNs available, and the video is below. I tried not to have the points poking right in to the lens, but well, you know...
Blue Sky Alpaca
Knitter's Pride Nova
Knitter's Pride Karbonz