I cut the jeans off at the desired length, just zig-zagged the raw edge, and then added two layers of eyelet. The longer, roughly 2" eyelet is the bottom ruffle, sewed on 1"from the bottom of each leg. That way it completely covers the zig-zagged edge, but doesn't add too much to the length. I then used a smaller 1" eyelet to add a second tier. Simple, but Lily loves them and they're pretty cute on. She says it's like having a tutu on each leg.
For the second pair of cutoffs, we decided to go with some color. Lily picked out some trim (the polka-dot rick rack - great choice!) and I coordinated a couple of ribbons. This pair had to be hemmed, rather than just having the edge zigzagged, since it isn't hidden the way the lace hides the edge in the first pair.