A handful of glass jars - Whatever is in cupboard. I used a jelly jar, a mason jar and a baby food jar.
Gold spray paint or enamel paint for the lids
White felting wool or cotton balls
Assorted figurines, small trees, little forest animals, small mirrors, jewelry - Whatever you want to display!
Start by painting the lids and let dry completely. Overnight if necessary.
Start with one jar and 1 lid. Practice setting up little scenes in the lid. I did this over and over until I figured out what was going in each jar, on each lid. Have fun! Get detailed or stay simple!
Once you have your scene, trace your lid onto the cardboard 3 times or more. This is to build your scenes up a bit so you can see it nicely through the jar. I learned this crucial step the hard way. Cut your cardboard circles out about 1/4 - 1/2" smaller than your tracing. You want them to fit in the bottom of the lid, leaving a generous space between cardboard and lid lip, so you can get your jar on with ease. Another "learned the hard way" step. Stack a few to reach the appropriate height for your particular scene and jar.
Tip: Use white cardboard if you've got it, or paint your little cardboard stack white. This will keep the snow nice and clean and will keep you from using too much. I learned this the... just kidding!
Now you can start reassembling your scene using lots of glue! Hot glue works great if you've got a glue gun. Take wisps of felting wool and layer over the cardboard. Glue down and add another layer. Start with just a little and build as you go.