Our potential exposure to chemicals can come from many different sources. The air we breathe, the things we put on our skin and in our hair, the water we drink, the food we eat, the clothes we wear, the building materials in our house, our furniture and list goes on and on. It's everywhere.
There's one thing we can do to limit our exposure. We can buy foods that are organic. I would add that organic is best combined with gmo-free. The Environmental Working Group has a great resource called the Shopper's Guide to Pesticides in Produce. This full list is worth looking at for more information.
The list includes the cleanest foods to buy that have the least residues and the worst foods that have the most residues. The idea is that you can make more informed choices about the produce you buy to choose more "clean" produce and less chemicals. This list is especially helpful if you can't find everything organic. There is a quick guide you can download here from their website.
I hope that you can use this list to help you make the best choices for your family. Children are more sensitive to these chemicals because they are smaller than adults and still actively growing. May we all benefit from healthy choices all through life! =)