School vacations can be very boring for children if they don't go away with their parents, so the authorities of some cities organise Vacation games for Children. if churches are involved in this, it can be a great evangelistic opportunity. In Neumünster, 40 christians from four different churches worked together with OAC for ten days at a large public open air swimming pool (about half a hectare). The programmes ran from 9 to 6 using gospel presentations alternating with water games. Many people were reached who would have hardly come to a christian meeting. In addition, the churches have grown closer together. It is now planned to invite the children, who were reached, to a special children's festival and to repeat this swimming pool outreach again in the future.