Dear Allen-T,
I just want to elaborate on Trumpledor's response to you about chametz.
He is right that during this holiday, we are not allowed to eat any bread or grain products, or anything that can be used as a leavening agent. Therefore, during Passover, Jews are not allowed to eat any beans, corn, foods with white flour, corn syrup, and foods with soy, soybean oil and/or corn oil. Also, any cakes or cooke that we have during this time must be made with maztoh mean, rather than regular flour. Ashkenazic Jews also do not eat rice. Mizrahi Jews (from the Middle East) do eat rice.