You don’t need dangerous explosives to put on an impressive fireworks show. Just grab a magnifying glass, a bunch of tiny resistors, capacitors, and transistors, and then blast them with more electricity than they were designed to handle. The results won’t disappoint, as long as you aren’t hoping for a Fourth of July extravaganza.
Here’s a guy who has made a career out of hilariously blowing up anything electrical and a perfect example of how NOT to do stuff. In this case, he makes rocket engines out of small capacitors (skip to around the 2 minute mark if you must). Check out the rest of his videos too. Comedy gold for geeks.