The pattern was very easy, I think it would be fine for beginners too! If your more experienced and crafty you can add more detail and even a little cell phone pocket for fun on one of the straps (just an idea, use your imagination and you could do ANYTHING!!!).
I found the basic (free) instructions here but I didn't make the interchangeable panels part.
The little child in the picture is one of our cute foster babies (that's why I had to block the face out) I wish you could see how CUTE they are! We have had 29 in the past year.