I would make STEM kits for $20 each (common lab compounds, electronic components, microcontroller, lenses, list of online resources, etc.) I would give them to

I would make STEM kits for $20 each (common lab compounds, electronic components, microcontroller, lenses, list of online resources, etc.) I would give them to high school kids rather than the younger kids they're usually geared towards. Make it a little bit edgy - high schoolers love fire we all know this - not like a bit of rocket candy is more dangerous that whatever else they have access to. If they want the next kit they pay $20, but they also have to give the previous kit to a noob first. The second kit would how them how to get all the components/compounds they need generally free or cheap.