"Made in China" took on an ominous connotation this year as more than 20 million toys manufactured for companies like Mattel were recalled for unsafe levels of lead. The neurotoxin can accumulate in the body and cause learning and physical disabilities in children. While trace amounts are found in lipstick and candy — the FDA has set a limit of 0.1 parts per million — lead in paint and plastic used in toys is troublesome since children are more likely to ingest it while chewing and sucking on favorite playthings.