I feel like I'm doing this all wrong.

Last week I started feeding my 4 1/2 month old cereal. She didn't seem to enjoy it but she didn't outright hate it, and she seemed more satisfied. This week she is rejecting the cereal, turning her head away and spitting it out, BUT when it is dinnertime she sits in her exersaucer smacking her lips, fussing, and crying while we eat. I don't know what to do.
