About using Glycerin in the snowglobe. I bought a jar of it at Rite aid for five dollars and thought I would give it a try. Everybody says use glycerin in a snowglobe but I really don't see it. I ran a bunch of tests. First 1 drop, then 5 drops, 2 tablespoons and even more. Technically it makes the liquid thicker but all I saw was clumping of the glitter. It didn't give a better "snowglobe" effect.
Eventually I just put a bunch of glitter right into the glycerin bottle! Yup, it's thick like gel and after shaking it the glitter is nicely suspended.
But it stays that way. Theoretically you are thickening up the water with glycerin but it really doesn't seem to work so I say just skip the glycerin. Plain old water is just better!