"sparkly things" stock assets for Premiere Pro? My wife wants a video slideshow for high school and college reunions, and the "free" (well, free with watermarks) programs have supplied assets for things like firecrackers and snow and other sparkly things; stars that spin and float around, etc.  

This is an Asian thing, you might see are popular in the style.  They are usually simple line drawings, on a blank background for compositing over a main picture. The style was popular with Flash graphics back in the day, and is endemic on Chinese websites.

Where can I find these to use with Premiere Pro?
Several years ago, Mitch Martinez created quite a stir by releasing an enormous library of stock footage shot in 4K resolution on RED cameras.  He offers a wide range of fireworks clips that are free to download and use.  Among other things.

I have no affiliation with Mitch whatsoever.  I just know the story.