I didnt take pictures while building but it was very easy.
Take the plastic container; something light weight, and clear. Mine was from spinach. Like this one
Attach fishing line or thread to the corners of main part of the container, not to the lid. Secure them in the middle so that it hangs evenly.
With the lid off, hang the container at a comfortable height to work on it. Attach the mesh tape in arches to help disguise the squareness of the box. To do this, cut lengths between about 6 inches and a foot, hot glue down one end, and then the other making sure the tape is arching away from the container. Creating an X with the arches helps to give more support. (in the picture my cloud was starting to look a bit square-ish from being squished while transporting it. But before it was much puffier looking)
Next, hot glue puffs of poly fill around the whole container.
Next, Poke wholes in the lid of the box, and use twist ties, wire scraps or cable ties to secure the breadboard or circuit board and arduino to the lid of the container. If you used a battery secure that down as well, if you are using a power cord, poke a whole in the top of the container in the middle and feed it through.
Flip the lid over and cover it and create puffs on top the same way you did on the outside of the container.