It is now common knowledge that ingredients in many plastics (especially when heated) may affect the growth and development of our children's brains. They can even lead to inflammation, increasing risk of diabetes and heart disease. Research is showing these chemicals (Bisphenol A (BPA), phthalates and flame retardants (PBDEs)) can affect mood, cognition, and our endocrine system.[2,3,4]
From our own personal experience, some children are simply more sensitive to some effects than others. Our own daughter was found to be quite sensitive to the endocrine system disrupting effects, and was sent to an endocrinologist about it-- SIXTEEN years ago!