Working out your biceps and triceps with resistance bands is similar to that of free weights but the versatility of the bands allows you to do more various exercises safely. Learn how to develop your arms with the simple instructions provided in this website. There are a wide variety of exercises that will help you strengthen your arm muscle groups for all levels.
As mentioned earlier, there are many different ways to work out your biceps and triceps using Theraband. Just be creative but safe. Following is a video from eHow that shows some additional methods for working out your arms.