Hmm..3 feet tall roll of paper, you say? Hmm..I'd probably doodle a few bits of pieces of anything that comes into mind (I usually draw chibi eyes, but you probably have more different ideas ) and get a paintbursh and draw/paint the first thing that comes into mind^^ Oh! You could even use some of the paper and use it for origami! There are quite a few of neat origami sites on google, so take your pic! ;D