Research has already determined that exposure to electromagnetic fields (EMFs) including from cell phones, smart watches and other wearables, virtual reality (VR) headsets, and other sources of wireless "Wi-Fi" radiation (including 5G) is biologically harmful.  In fact, manufacturers are required to provide warnings about exposure risks for all wireless radiation-emitting devices.  Health experts have also warned for years that children are more vulnerable to exposure (see 1, 2, 3, 4).  Of course, research has also determined that exposure to blue light from screens and other sources is biologically harmful as well (see 1, 2, 3, 4, 5, 6, 7, 8, 9, 10) – especially to kids.  So it may be more than "nervous tension brought on by excitement" and undiagnosed pre-existing conditions causing children to experience medical emergencies including fatal heart attacks while playing video games.