The trip had been organised by the youngsters themselves with the help of Carnoustie High School teacher, Jim Bell.
Across the world, 100 cities participated in an international campaign to raise awareness of what is happening to the child soldier
s.
Out of all the UK wide Rescue events, Edinburgh was the best attended in terms of those staying overnight - even London could not match it.
Mr Bell told the Guide & Gazette: "It was a tremendous event for us. We were the single biggest group there which in itself attracted a lot of attention.
"The Invisible Children ran the whole event in a very professional and safe manner and there was not one discordant incident caused by any of the many young people who took part.
"We set out from Holyrood in groups of 20, walking in single file and holding onto a rope, to represent the plight of the child soldiers. This drew lots of interested, not to say bemused, looks, from the many passers-by.
"We walked five kilometres to Princes Street Gardens where we set up camp for the night. This was the first time ever that permission had been given to camp overnight in the Gardens, Edinburgh Council having allowed the use of a red ash area for the camp."
He continued: "We waited to see if we would be 'rescued'. To the delight of all there, our rescuer turned out to be Billy Boyd, one of the hobbits in The Lord of the Rings. He spoke briefly, but passionately, about the need for justice for the child soldiers and then spent lots of time signing autographs and having his photograph taken with his many young admirers. He was a great ambassador for the cause."
Billy Boyd rescues the group.
Xenia Skinner who, at 13, was the youngest on the trip was asked why she had been prepared to give up all her home comforts to take part in the event. She said: "I had an amazing experience in Edinburgh. As the youngest I was as well looked after as you would be at home.
"But the children in Northern Uganda don't have homes and families to look after them. I was so happy to have an opportunity to help and I hope that other people might get together to help too."
Katherine Ramsay (15) commented: "I attended this event because I feel that there needs to be a change in this world, starting with the child soldiers.
"I hope the government will listen to us even though it may be hard to hear this from people so young. It is about our future and we want to see it change for the better."
Another 15-year-old, Kathryn Fleming, said: "I had never heard of Invisible Children before they came to school. When they told us about the child soldiers I thought that this was so awful because this has been going on my entire life and yet the media attention is so low.
"That is why I had to do something when we were given the chance to go to Edinburgh. I also did some YouTube videos asking people of cultural influence to come to the Rescue and to help raise awareness of what is happening to these poor children. I am so glad to be a part of this awesome movement."
Mr Bell concluded: "I was incredibly proud of these young Scots from Carnoustie. They were outstanding in every way and it was an honour to be with them in this call for justice.
"The invisible Children organisers told me that the Carnoustie contingent "brought the party with them" in recognition of our major contribution to the event. They also told me that the majestic backdrop of the castle made Edinburgh, alongside London's Tower Bridge, one of the two most iconic Rescue camp sites in the UK."
