The pouty Bratz dolls so popular as Christmas presents are made at a factory in southern China where workers are obliged to toil up to 94 hours a week, among other violations, a labor rights group said in a report released Friday. The report by U.S.-based China Labor Watch and the National Labor Committee details allegations of harsh working conditions, especially during peak delivery months, and of violations of workers' rights to injury and health insurance...MGA Entertainment Inc., which launched Bratz in 2001, said Friday it is "not familiar with the company named in this report. "MGA uses first rate factories in the Orient to make its goods," the company said in a statement... Wal-Mart Stores Inc.,...a major distributor of the Bratz dolls, said it was investigating the situation.