Here are some tips from the book Squeaky Green: The Method Guide to Detoxing Your Home that will help you eliminate those problem items, specifically in your children’s rooms. 

-    Have your kids use paints and pens that are certified by the Art & Creative Materials Insitute.  They’ve been an extensive screening test for safety.
-    Buy your children wooden toys, since they are non-toxic.
-    Buy bedding that has natural fibers or says that it is PBDE-free. 
-    A lot of toys are made with PVC (polyvinyl chloride), a type of plastic made with phthalates that are harmful to both children and adults. You can tell if it contains PVC if the toy smells like a new shower curtain or new car.  On all plastic products, there is a triangle symbol.  If there is a number 3 inside this triangle, that means it is PVC – same with the letter V under the recycling symbol.  Fortunately, a lot of companies aren’t using PVC as much and there are a lot of other toy alternatives.
-    80,000 pounds of plastic and 200,000 trees are used every year to make disposable diapers. Try to buy diapers that are made from recycled materials and are chlorine-free.  Cloth diapers may be the best option – since they have more air flow than disposable ones, which cause diaper rashes.
-    Use biodegradable wipes and try to compost them.  Also, make sure they’re chlorine-free.
-    Try to wash your children’s toys about once a week.  Dust mites and mold will build up in toys like stuffed animals.  One solution for children who are allergic to dust is to freeze the toys in a plastic bag for 3-5 hours once a week.
-    Keep the furniture in your child’s room as simple as possible – like wood.  Upholstered furniture and headboards can build up dust mites.

Source: Squeaky Green: The Method Guide to Detoxing Your Home