I agree with everyone who has said this type of donation is cheeky, in fact I agree with Gagagran who said it verges on fraudulent.
All three of my children either self funded their gap years, or we paid for them. Our son went to Australia and Fiji, he worked before he went, he worked whilst he was there, and we paid some of his expenses. He returned home and then did a four year course at university, The University of Wales. Our second son went abroad after he graduated from Oxford University. He went to teach in The International School in Sri Lanka for two years. He was entirely self funded (he was paid by the school.) He is now a barrister in London. Our third child, a daughter, did an Elective in The Philippines as part of her medical degree. She worked in a hospital, and only received bed and board for this, no pay. We funded this worthwhile trip.
Why on earth would I or anyone else fund a party of two adults and four young girls to go on holiday? I think I’m lost for speech, unusual in my case!