Rainbow Dash has always been one of the most popular ponies on the merchandising side. Turns out little girls aren't always all about that blinding pink and purple they are constantly force-fed at your local retail stores. A 3D Prostetic company called e-Nable has created the Rainbow Dash hand above for someone.
This style is still a pretty new thing, but they plan to continue to keep improving the design and efficiency as the technology continues. You can read all about the specifics over here.
Thanks to Frankie for the heads up.
