EWG

Wireless devices like cell phones, tablets and Wi-Fi routers and many other types of communications equipment give off radiofrequency radiation, a type of electromagnetic wave.

Radiofrequency radiation is absorbed by the body – more in parts with higher salt and water content. Children have a thinner bone structure, thinner skin and higher tissue conductivity. So, as studies show, their bodies, including the brain, absorb more radiation, compared to adults’

… Scientists are still studying the effect of radiofrequency radiation on the nervous system. Research suggests the effects may result from disruption of the blood-brain barrier and changes to cell membrane permeability and how well membrane channels are functioning. Radiofrequency radiation exposure also increases the formation of reactive oxygen species, which can cause wide-ranging effects on cell signaling and function in the body.