Baby boat shoes!! I just finished these up. Once you get the hang of the straps they are pretty easy to make and are pretty quick. The original pattern is from the Whistle & Ivy website and is available here. What's nice is that she has a video tutorial available for the whole pattern and a separate one for the sole and straps.
If you are interested in a finished pair they are listed in my Etsy shop Twisted Fibers Designs