Get a kilo of sardines in the market, take it to the sea, river or lake. Bring a knife and clean the sardines one by one. Cut the head first, make a lateral incision with your knife, clean all the remainings. When you are done, use the heads you separately collected in a bucket. Take them in your hands, enter the water with your hands full of heads, float on the water, and let the fish come to eat out of your hands.
Do it over again until you finish the heads. Afterward, eat the rest of the sardines or give them to someone who would appreciate eating them.