I made them by making a mold of two beads with paper and glue, in two parts, attaching them when the molds were dry. I made a cut a little below the middle.
I then searched around for other tools I could use, to make a middle-sized doll mold. I ended up using the bottom of a pen for the bottom, and the bottom of a stitch-ripper for the curve. The littlest is just made of foil with a paper wrapping.
All the details are done with tissue paper, and the insides are bright orange! The colors are blurry in the pictures, and the details are a little hard to see, but I am unfortunately not a photographer, and I had to manipulate angles with great precision in order to not show the massive mess that is my bedroom. Have I mentioned how much I love Paper Month? It's a blast! The nesting dolls are seriously loads cuter than they look in the picture.