Simple particle emission of a geometric object (a kernel of corn)

Firstly, I am not a Python guy (yet). I’m animating the offloading of corn from a grain hauler. It’s very simple in C4D, MAYA, HOUDINI etc, but I cannot wrap my head around the particle systems in USD COMPOSER. I constructed one scenario where the sprites were doing exactly what I want, but I cannot figure out how to exchange the sprite object with an actual object (a kernel of corn) . It may be the nomenclature COMPOSER uses, but I’m stumped.

I started with a Geometry Replicator system and adjusted all the settings to give me a gradual build from 100 to 5000 particles (or SPRITES in this case). Just don’t know how to replace sprites with corn.

Can anyone advise how to do this?

Let me pass this over to our physics team.