Why do they call this stuff cereal?

We got to start with rice cereal for the first time with Kaylee last night. She did great with it but I don't think she really liked it much. She kept giving me these eyes of "what are you putting in my mouth?" The doctor said that we can give this to her once or twice a day, but it is just to get her used to eating from a spoon and then at 6 months, she gets the good stuff. It was a lot of fun feeding her last night though.

This was when she had enough and was just spitting everything back out at me instead of swallowing.