corn/rice cereals and pasta

Question

My 17-month-old daughter has many food allergies (wheat, dairy, soy, nuts, fish, and eggs and possibly some others) and her diet is pretty limited. Are the following cereals and rice cakes OK for Passover? 1) Rice Twice made by Erewhon (Gluten-free, 100% natural; organice brown rice, organic brown rice syrup, honey, sea salt) 2) Rice Crunch-Ems! by Health Valley (milled rice, corn bran, evaported cane juice, salt, natural vitamin E [added to preserve freshness]) 3) Corn Crunch-Ems! by Health Valley (I don't have ingredients here, but they are the same as the Rice Cruch Ems I think with corn flour instead of milled rice) 4) Landau rice cakes, lightly salted (whole grain brown rice, salt) 5) DeBoles rice spaghetti (rice flour and rice bran extract) 6) DeBoles corn spaghetti (yellow corn meal and yellow corn flour) Thanks!