There are 5 houses on Jewel Street. There is House 1 wih 6 children. House 2 with 5 children, House 3 with four children, House 4 with three children and House 5 with 2 children. The distance between each house is 100m. If the school bus can only stop once on that street, in front of which house should the bus stop, so that the total sum of walking distance among all the children will be the least?