Dried corn kernels are readily available from most supermarkets. Commercially-produced ready-to-cook popcorn kernels are also available, sealed in bags that you just put in the microwave.

Some other grains, such as quinoa and sorghum, can pop too; but popcorn is the biggest and best popper! This picture shows 200 kernels of popcorn in a 1000 mL graduated cylinder and 200 pieces of ...