How do you increase/decrease player size ingame with particles and / or triggers?

Hey guys!
I’m working on the rolling blueprint at the moment and I would like to know if there is a way to increase and decrease the player size in game when the player collides with particles or trigger boxes that I set? Any help + pictures will be really appreciated. Thanks in advance.
Raiden58237

Ditto! Been doing searches but come up empty handed… also need to know how to prevent players from floating when they shrink.