<<Disclaimer: Verify this information before applying it to your situation.>> I wanted to thank those of you (over 30 of you) who responded to my worries of my 3 year old son who was accidentially given an oreo by a mom helping out in his preschool class...My son never showed a reaction so apparently, he is not sensitive. Quite a few parents had been in a similar boat as I was and they wanted to support me and share that is it difficult to keep our children gluten free in an environment that we have no control of and that accidents can happen, but luckily with support and understanding and education, they are few and far in between. Many respondents stated that one piece of cookie won't necessarily cause a reaction in my son, and that it takes several exposures to gluten to get a reaction and that it can take up to 6 months to have a reaction unless you are hypersensitive. Many of you also shared that 3 years old is too young to understand the consequences. They will attempt to do as others are. They are also used to authority figures handing them what they can eat, therefore, they assume whatever is given to them is okay. They will learn more and more as they age. Many of you applauded Tyler's teacher for becoming more proactive by putting a warning about feeding the children without checking with the teachers first. Tyler does bring his own GF snack to school each day as the moms in the class take turns bringing in a snack for the day and it is difficult to learn in advance what will be brought in... One mom suggested doing what she does with her son, and that is putting a sticker on the child that states "do not feed me anything that has not been approved by my parents first"... Thank you once again for your kind words and support and advice. It is greatly appreciated. Robin in CO, USA