Felix the cat was my favorite too along with "how much is that doggy in the window?" I just googled it and now have the song stuck in my head. haha
Lucky charms was my favorite cereal. Not sure my parents bought it often but it came out in 1964 so that fits in my childhood range. I'm sure one box would be gone in one sitting though with the size of our family. My dad was a wheaties or shredded wheat guy!
Not cartoons but Roy Rogers, Flicka, The Lone Ranger were my Sat. favs. Not sure I had cereal with them but did always have a can of vegetable soup...not diluted, not heated, eaten straight out of the can for lunch.