Legolas if you solve the problem CORRECTLY you'll probably see why the 3rd clue is needed
Zuvio - trust me, there is only one possible answer that fits the clues in the question. Obviously the ages of the kids are in years (nothing more accurate).
Hmm maybe I should just post the solution and put people out of their misery?
I have had quite a few PMs but still only Grojlach and Seraph managed to solve it!