It is a pity that despite the clear explanations given by Constance and Linsco66 that many on here have been a bit over suspicious and even verging on nasty. These teenagers or their parents pay for their own expenses, the £2000 figure or whatever, is the minimum amount that the charity want them to raise, exactly the same as the London Marathon where you have to guarantee to raise £500 as a condition of entry. Although we are of course, all fully entitled to support charities or not, I think these young people are to be applauded for what they do. These trips are life changing for many, and the discipline involved in raising the donations, organising their travel, inoculations etc are all excellent life skills. Those who suggest that this is an underhand and crafty way of paying for a holiday have got it wrong. Support charities as you wish, but do not criticise those who are trying to do it their own way.