The charity will hold a press conference on 5 July, the day before leaders convene in Gleneagles, to publicise the recommendations of C8 and put pressure on leaders to tackle child poverty.
C8, from 3-5 July, will be held in Dunblane, where 16 children where massacred in 1996. The town's association with that tragedy had no bearing on Unicef's decision to locate the conference there, the charity said.
The conference will be attended by children from eight of the world's poorest countries and the G8 member countries.
The attendees will discuss the most pressing problems facing children and look at how issues such as trade, aid and debt affect them. They will also come up with ideas on how leaders can tackle the problems, which will then be promoted to media.
A report will also be sent to media and policy makers asking them to act on recommendations.
'The decisions G8 leaders are making will directly affect the lives of children, so children should have a voice,' Unicef media officer for campaigns Kate Epstein told PRWeek, adding that C8 would act as Unicef's main contribution to the Make Poverty History campaign.
She said she hoped to involve Unicef ambassadors and celebrity role models for children.
Media conferences will be held in each of the countries represented before and after the summit to publicise their roles in C8.
Each evening after the conference the children will also write reports for newspapers in their native countries and the Unicef website.