DavidGilbert99 writes: Google Glass is the gadget of the moment. Everyone wants one, but virtually no one can get them. They will go on sale to the general public next year, but not to those under the age of 13 apparently. Google has updated its support page to say Google Glass should not be worn by children under 13 "as it could harm developing vision. Glass isn't for everyone. Like when wearing glasses, some people may feel eye strain or get a headache."