We had a to phase out soy too, which once I phased out casein and gluten the soy reaction was really obvious. Not everyone does though. We also had to go food coloring free but that reaction also was so obvious that we did it a long time before everything else. Hopefully your DS won't need as many restrictions, but even if the does it's good to take it one step at a time so you don't get too stressed and overwhelmed. I will say Pamela's bread mix, ordered in bulk from Amazon once we tried it at Whole Foods, is one of the best things that has happended to our GF cooking. We use it for pizza crust, pie crust, and bread. Udi's bread is also good, you can find it at Whole Foods and we buy it at Wegmans but they are only in NY and VA I think. There is this one brand of GF pasta that is in shapes, bicycles, animals ect is a big hit, I am forgetting the brand right now, it's good for making mac and cheese or with sauce (we use Diaya cheese for mac and cheese since we are casein free too) or my DD likes it just with olive oil and salt. GF products vary wildly in terms of taste and texture so there is some experimenting needed. There is a good book: The Kid Friendly ADHD and Autism Cookbook that we got off of Amazon that I really like. The first section explains special diets and the second half is a recipe book. I also got her a laptop lunch box so she has her own special way to have her safe foods with her when we go places.