i've never done this before! but the other day i woke up and decided i was up for a project.
i looked up some instructions on the interwebs and off i went. i found some boxes to use, one large enough to hold the other with insulation around it, because it's important to keep the heat in.
the idea is that you capture the sun's heat with the reflectors and then trap it in the box under a clear cover.
i got kind of sciencey on it and i recorded the temperature i was able to get it to at various stages of the build.
temperature of the box in the shade: 62.6°F
the box in the sun: 100.9°F
reflectors added: 125.6°F
with clear covering: 173.3°F
when i tell people that i built this thing, they ask me what i made with it.
my answer: a hot thermometer.