I've been using Ancestry.com for many years, and have loved finding draft cards of my ancestors. However, with the new "Leaf" feature, I discovered that my grandfather, William Franklin Butler III, had to register for the draft (which I was unaware). Here's his draft registration card (World War I Draft Registration Cards 1917-1918):
Tip: To preview the image better, just click on it to enlarge it. If you want a copy, right click on the image and save a copy to your computer. Enjoy!