Have you ever heard of Whimsy Couture? Denise has all sorts of great tutorials, links and patterns. I tested her overalls - quick and easy and so adorable!
There are knots at the front, and you have the option of stitching up the inseam or using snap tape. I chose to stitch it up. The ruffles at the bottom add a little bit of "whimsy" as her name says! They were a little big for Abby, so they may be going to one of my nieces, or I'll wait for Abby to grow into them. Technically these were capri length! Now I know to do it shorter for her.