My Grandpa showed me how to 'fancy' shuffle cards when I was 4 years old. My parents helped me practice until at age 5, I finally mastered it. (Thanks Pops) My favorite thing about investing that time is that, like riding a bike, my muscles never forget how to do the fancy shuffle no matter how long I go without touching cards.
For the pure satisfaction of looking like you know what you're doing when you sit down to play any card game (read: How To Look Like a Card Shark), I highly suggest taking the time to learn. You won't be sorry! And don't worry, you won't take as long as I did to learn. I blame it on the tiny hands... : )
NOTE: Card selection plays a huge role in how easy or hard this type of shuffling can be. If your cards are really sticky or too slippery, shuffling will be harder. I recommend getting either Hoyle or Bicycle brand cards.