"Cereal pieces" refers to the individual parts or chunks of cereal that one can eat. It usually refers to the solid bits or flakes found in a box of cereal that you pour into a bowl and eat with milk. Full definition
Some parents use things like cereal pieces as a sort of bull's - eye for their little guys to try aiming at. (kidshealth.org)
For the cereal, once it has baked and cooled completely, you want to put it in a gallon zip lock to break it up into small cereal pieces. (100daysofrealfood.com)
But does equating the collision of cereal pieces with the basis of all human relationships stretch a metaphor too far? (canadianbusiness.com)