According to the fda, products labeled gluten-free must contain less than of gluten.

According to the FDA, food products labeled "gluten-free" or "no gluten" must contain at least 20 parts per million in order to be in an acceptable range. Especially since people with celiac disease, when the small intestine is sensitive to gluten, can only tolerate a tiny amount.

Little kids are eat dirt all the time so im sure you are fine