For a party a while ago, designed a big 4 foot Ben 10, but out of that came a fairly quick but instantly recognisable smaller version.
I don't usually post instructions or pics as i want everything to look perfect, but recently decided to just get some stuff out there if it might be of use to someone... So here is some fast ugly instructions, taken on my average phone camera...

Take a white 260, and marriagetwist a blush 160 into it. Make a 2 inch bubble in the white for the sleeve, then a pinchtwist for the shoulder attachment. Repeat so you have two sets, then twist in the middle to make the x in the below picture (apologies for the low quality).
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ben-10-a.jpg [ 10.26 KiB | Viewed 463 times ]
Take a black 260, wrap the knot into one of the pinchtwists, make a SOFT 1/2 inch bubble, then the run the balloon down to the join in the whites, twist there then run another bubble the same length up to the top again, lock twist these together as shown...
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ben-10-c.jpg [ 10.8 KiB | Viewed 462 times ]