Let's Make a Sword

Making a balloon sword is easy.  It's often the first or second thing people learn.  Because the balloon is fully inflated you don't have to worry about air management - unless you forget to burp it.  Then the balloon may be too tight for twisting.  You'll know this is the case when you have to use muscle to force it and then it just explodes.  Balloons are like babies - burping is essential.