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.
This picture shows 200 kernels of popcorn in a 1000 mL graduated cylinder and 200 pieces ... Butterfly popcorn has a very irregular shape with large bumps. It has a light crispy texture but can break ...