Spawn on death?

Is there a feature or addon for particles that spawns children particles on parent death? Fireworks, water down a window, that sort of result…

Also, is there any tutorial that really, REALLY looks into the Boids particle system beyond a flock of birds or army battle sim? And has anyone used Boids with trails?

Let’s have it! Hit me with your all.

Could this help?
http://orsvarn.com/post/spawn-on-particle-death/

Good find - I’ll keep that handy but it spawns objects. I wonder if blender would freak out if I attached particles to those objects and kept the count super low. So it’s worth examining though it falls outside the description - thanks! I’ll post what I learned.

Still looking for other ideas too.