Sew top of jeans onto skirt material. I used an old pair of jeans & an old skirt. Its so much easier with an old skirt just make sure you get the hemline correct before you sew it together. (BW) perfect for those too short girls skirts too!
How about turning a hole in the knee into a monster mouth? I decided to patch my partner& jeans this way after spying this great idea on a social networking site. Here& my version of the monster-mouth knee-patch.