The Florida-Georgia District of the Lutheran Church Missouri synod has arranged a Children's mission project called Hearts for Jesus.
In short the idea is for children to share the Gospel of Jesus with their family and friends and raise funds for those in need overseas.
This year they used the DVD story: 'The story of Jesus for Children"
They have prepared teaching notes, handouts, activities, etc. to support the project. Whilst this project is specifically for their District I am sure you could easily adapt it for your own situation. Why spend a few moments reviewing the project at: http://www.flga-lcms.org/Schools/HeartsforJesus/2008ProjectInfo.htm