Does anyone else approach these "teen invents x" or "wiz kid middle schooler discovers y" articles with extreme skepticism? About half the time the invention turns out to be bogus or trivial, and in the other half it comes to light the parents were behind it.
from 2013 article [1], though it seems not practical [2]:
"W2Plastics has shown the viability of magnetic density separation, where flakes of shredded plastic such as polyethylene or polypropylene are mixed into a magnetic fluid made by adding iron oxide to water."
I am not sure which one is better to show kids they discovered something existing, or praise them like this
[1] https://horizon-magazine.eu/article/magnetic-attraction-recy...
[2] https://cordis.europa.eu/article/id/131208-sorting-plastic-w...