who is the tallest?

Clearly it isn't me, i think Koen has layers of cardboard in the soles of his shoes, he denied this of course, and i haven't started the shrinking stage yet, Koen turned 13 last month so he has a lot more growing to do, since being a nipper he was always the smallest, the smallest in his class the smallest of his friends he is very pleased that finally he has started to grow, at a very fast speed too.