Warnings for some Amazon products

I just placed an Amazon order because I love shopping there, but when I was about to order some items I found a warning when I read the product details that scares me a lot. Why don't we all deserve this warning, and why is our government allowing these items into our country?

Our kids' school supplies may be toxic

After all the back-to-school shopping, our children have returned to school. Now, there's a warning that the supplies we purchased may not be safe.