It depends upon your family size and the age of the children. When my 3 children were younger (1 girl, 2 boys) I spent an average of $650 per month. Now I spend between $375 to $550 per month. Having a garden helps, as well as shopping the "Reduced Sections" at the grocery stores. Also, I bake muffins, cookies and birthday cakes to incorporate healthly ingredients and save money. Try to stock up on staples for your pantry, it really helps when there are times you don't have a lot of money for groceries.
kajeet: the cell phone service for kids.