Forget China — the lead threat may already be in your home.

Lead paint was banned in the U.S. in 1978. But nearly three decades later, hundreds of thousands of children — most of them under age 6 — show signs of lead exposure, according to USA Today. And, while those recalled "Made in China" toys are certainly to blame for some, most often the high-lead culprits are under our own roofs.

The American Academy of Pediatrics estimates that one in four children live in houses with deteriorated lead paint, putting them at risk for lower IQs, severe learning difficulties, behavioral problems and even death. 

If you live in a house built before 1960, keep reading to find out the best way to lower your kids' lead exposure risk.

Replace all your old windows! Why? According to USA Today, "as a window is opened and closed, lead paint deteriorates. Toxic lead dust and chips accumulate around the window, on the window sill and on the floor." For more tips on making your home lead-free, click here.