Ever cut an onion or a piece of garlic for dinner and then have that wretched smell on your hands that lasts for days? Try rubbing your hands under cold water while rubbing your stainless steel knife that you used for cutting. Take the stainless steel knife and run cold water directly over the knife for about 30-45 seconds. Place your fingers on the center of the knife, avoiding the sharp blade, and slightly rub the knife. Repeat as necessary. This is not really a great trick for children and like I said, watch out for the blade.
Better yet, if you're really freaked out about using a knife, feel free to use a stainless steel spoon. It works the same and you avoid the danger of accidentally cutting yourself. I know some department stores also sell a stainless steel piece that looks like an egg or bar of soap. Works like a charm.
This Rub Away Bar can be purchased at Crate and Barrel
And --- since we're talking about the How-To's of removing the smell of garlic -- rubbing toothpaste on your hands does the trick too! But I'm thinking sticking to the stainless steel utensil is your quickest solution. :)