A multistate study published in the October journal of Environmental Health Perspectives shows that children will have significantly decreased levels of some pesticides if they change from a conventional to an organic diet. But this does not get rid of all of the pesticides.
They conclude there are other sources of exposure. One is that children in agricultural communities may be exposed to drifting spray.
Another source is that needs to be considered is that we know these chemicals are in our drinking water, the United States Geological Survey tests confirm this.
Organic food is great, but if we want to keep our children free from toxic chemicals we need to stop using them on our yards and letting them wash into the streams and aquifers that supply our drinking water.