How many people must be killed or serious injured before simple fact become clear.
-firework and serious explosive are not same at all but incidentally can be triggered on same stupid way.
-most even not commercial explosives are under control (law regulation, with reason)
-rocket models and firework safe fire using e-match (look like army detonator but have no charge high explosive to detonate main explosive charge)
-army and other high grade explosives use high detonator (look like e-match)
-electric detonators are two main type,
wire bridge and
bridge less (second one is used in mine. anywhere if incidentally can be first one trigger by induction in conduits)
-electric detonators for high blast explosive charges have pyrotechnics delay (safety mechanism or you cannot use in one blast more than 1 detonator, detonation cut the wires)
-e-match is good idea for fireworks, rocket models but cannot detonate high
power explosive(e-match buy in store not risk life making own idea, unless you have good practice)
-electric detonator for high blast explosive, cannot safe fire rocket model(only if you want risk and open this electric detonator to remove second explosive charge, I was too stupid to do it this but not all people have luck, some stay without fingers, some was stay blind)
Any way all this not for people under age , and also with no good practice.
Second charge, forget high blast explosive, even propelling explosive (black powder) can serious injured and kill.
High power blast explosive people forget(any way
this is Electronic forum, I was make this device but sorry according rules in this forum and my rules too I newer give advice how to make this device to nobody)
Firecrackers and rocket models. It is easy fire charge remote but most secure is using wire.
Wireless become too complex (if you want to avoid fire because someone use in neighborhood any kind radio) If even in use is high quality receiver, still you have problem , simple on off carrier not recommended. Only high encrypted wireless. But ring a bell? This become all but not easy task and sure not for 10$
Audioguru say"Whe weirdos who like to blow themselves up do not use remote control."
Maybe, but suicide bombers, who acting by religion believe, they do not know, bomb maker put 3 difference mechanism . Safety using timer after some time is possible to detonate suicide bomb, manually switch (suicide bomber know only for this one) and third is remote controls, if suicide bomber become "lack in their believe" and start think too much. In this case someone push button and detonate bomb, remotely.
That's all folks.
O yes if you need to prevent neighbor cats and others animal , easy small firecracker and small amount white pepper of coarse water proof , and work.
But use the wire