I then saw a hooded towel poncho on Delia Creates. She cut her slit for the head lengthwise, rather then from front to back.
I then decided to try and incorporate the two and go for it.
I am not the best photographer or the best at getting pictures in the order I want them, but I will describe the process as best as I can.
I started with a regular sized towel for the poncho and a hand towel for for the hood. I folded the bath towel in half and then cut a slit in the middle. It ended up being about 13 inches long. I made sure it fit over his head. I serged the neck opening to keep it from fraying. Then I moved onto the hand towel for the hood.
I folded the hand towel and put it on my sons head to see how to fit the shape of his head. You can kind of see my pin placement on the towel above. I created a curve 2/3 from the front of the hood edge and then curved it down at an angle so it went down to the bottom corner of the towel. I sewed this, finished the edges, and cut it. The pointed angle is important as I cut my head opening so that there would be a V-shape in the front and back of the poncho.
Here is the hood sewn in...
and the finished hooded poncho.
I pinned the hood and towel right sides together. I cut a strip of towel 2" wide from the scraps of the hood to finish the front neck opening. I sewed around the entire neck opening and then top stitched the front binding down.
Here is a view of the back of the towels while handing.