When gathering chestnuts, try to collect the plumper ones as thin ones won't really be worth the effort. Discard any chestnuts that have broken or damaged shells. And watch out for the prickly spines of the outer casing. Once you've collected a few good handfuls, you can consider ways of cooking them.
It's possible to cook chestnuts in a microwave or oven, but be sure to cut or prick the outer shells first otherwise they are likely to explode in a sticky mess. The best way to cook them is over an open fire or gas flame.
It can be hit and miss when it comes to cooking them so have a look at the video below to see how it's done.