You can make this as easy or as elaborate as you want. You can easily adapt the subject to your sculpting experience. Making the house or another self made "container" can be a bit tricky. It took me two and a half attempts to get it both clean and watertight. But by sharing what I learned I hope you will be able to get it right the first time. I also give some general tips on making snow globes with ready made globes, which is easier of course.
Step 1: Materials
polymer clay of the desired colours or mixed to the desired colours (I use Fimo Soft )
brass, copper or other corrosion resistant wire about 1mm diameter, about 1m length.
a sharp hobby knife
pencil, paper, cardboard & tape
clear acrylic sheet. I prefer relatively thick sheet, 4 mm, in order to get enough surface for a strong glued joint. I ordered pieces of 90 by 120 mm from www.opitec.com, to save time in cutting. I needed 7 pieces, but I was happy to have order some more to practice.
a piece of right angled profile to use as a gluing jig
coarse sanding paper (60 to 80 grit) and/or a large hand-file
a couple of cm of clear acrylic tube, about 0.5 to 1 cm diameter.
some masking tape