I've seen the "pound dirt into plastic bottles for building" which is a variation of this mentioned in the link, in another place. I hadn't heard about jamming other wastes like Styrofoam and plastic bags in which considering all the waste on this planet, I think that's brilliant! Yes, it would be time-consuming on an individual scale, but as a community building
project, it would also support youth "ownership" in their school.
In a perfect world, we simply would stop creating so much non-biodegradable waste. A
local town determined that the most prevalent single plastic garbage item on their beaches were plastic
spoons. They have locally banned plastic cutlery - it was Ucluelat - so has Tofino - yeah!
https://www.timescolonist.com/local-news/ucluelet-also-says-no-to-single-use-plastic-utensils-5203194#:
However, until we get to that point, let's find better uses for the results than fouling our beaches or filling our
land fills.