Haven't tried it but found this:
http://giftedkids.about.com/b/2008/01/22/age-discrimination.htm
"As with the example of work, other aspects can cloud the issue, maturity and behavior, for example, but if we take those out of the equation, that is, we say all those things are equal, aren't we discriminating against those gifted children when we deny them the appropriate academic situation solely because of their age?"