Exploding Targets: shooting aid or a 'bomb kit for dummies?

At gun stores from coast to coast, and on the Internet, they are known as “exploding targets.”

These exploding targets make shooting a blast! — GearScout Guide

Tannerite, Military Wiki

Sure Shot Binary Targets Bulk Mix Kit - 5lbs

Tannerite® Starter Kit ~ Single box of Six 1/2 Pound Targets – Tannerite®

Exploding Targets

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Tannerite, Military Wiki

Sure Shot Binary Targets Bulk Mix Kit - 20lbs

Making Tannerite, I imagine there's a whole lot of people in violation of that law.

Tannerite® – Reactive Rifle Targets

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