thanks for the compliments ladies! yes, it started as an unwashed sweatshirt (2 sizes too large, $4 at big lots) and a variety of unwashed Christmas fabrics and cotton thread (3 spools!).
yes, June, it would be pretty in spring prints!
i don't think i can legally share/copy the pattern here, but basically it's rectangles of fabric stitched onto the sweatshirt (after you cut it open). the pattern is by Back Porch Press and this is their website.
http://www.backporchfabrics.com/vests.htm
nanobirdmo - i'm a TERRIBLE teacher :( you wouldn't want me to try. but the pattern/instruction is very easy to follow!