how do i get an instance to occur at a part in game.workspace?

I've recently learned how to get instances to spawn but what I want to know is how do I get an instance to occur at a part that's in workspace. I wanted my script to send the new instance to occur at its parent which is a part the instance I was using is an explosion this is what I tried

local run=true

	while run do

		E=Instance.new("Explosion",game.workspace.Explosive)

			wait(4)

				end

Explosive is "Explosion's" parent which is a part so I thought if I transferred the child to the part it would send it there but when I tried it still just made an explosion in the center of the world how can I make it explode at its parent instead of the center of the world. Thanks