No - we didn't have a co-op!
We had boiled eggs or porridge or toast and marmalade for breakfast. I hate cereals now, I did try them when I got married because Ex had been brought up on them. I couldn't understand why people liked to eat small pieces of sweet cardboard floating in milk. However, I do now love granola. Once when I went to stay at a small friend's house, I was offered a box of cereal, removed a Weetabix, wondered what it was, and spread it with butter and ate it. It was quite hard, so I took another but spread more butter on it to make it easier. No-one said a thing! I went home and told my mother, she bought a box of it and gave it to us and we all loathed it. I think it must be something you have to have been used to having from an early age in order to like it.
Shredded wheat used to enter our house once a year, and that was to make chocolate nests for Easter eggs.