Its both troubling and exciting at the same time that three 14-year-old children in Great Britain came up with an absolutely amazing condom concept, one thats .brA condom that changes colour when it comes into contact with sexually transmitted infections has been invented by a group of school children. The S.T.EYE .brThese kids arent just all right, theyre brilliant. A group of schoolchildren have invented a condom that changes color when it comes in contact with a sexually .br3 students took the top prize in health at the TeenTech Awards for their concept, the S.T.Eye -- a condom that can change color if an STD is present.