The average IQ for a fourteen year old is 100. The average IQ of a two year old is 100. If you are eighty or eight, 100 is average.
The average IQ is 100, with a standard error depending on the test...
I don't think there are any legal issues about it, since 14 and 16 are both underage (although there would be problems in two years, when one's 16 and the other 18); however, there may be some moral...