Hundreds of Christmas presents in France have been secretly filled up with unexpected pamphlets that declare, "Warning, this toy is sexist," The Telegraph reported.

A group of French feminists, known as FièrEs, have issued the warning by secretly inserting around 500 pamphlets, resembling those found in Chinese "fortune cookies," inside hundreds of children's toys, which range from Barbie dolls to plastic guns, in about a dozen shops in Paris.

"We targeted games that are emblematic of boy-girl stereotypes," Delphine Asian, a legal representative for the feminist group, told The Telegraph. "We have caused no damage or ripped any plastic. We simply slipped the message in boxes, or in books."

When opened, the pamphlets request parents to sign a petition and send it to those "responsible," according to Fox News.

However, the purpose of the project was not to "make parents feel guilty," but to "raise awareness about the fact that toymakers and sellers play a part in the fact that not a single little girl asks Father Christmas for a sword," Asian said.

"We know well that parents follow the lists their children write and don't think they're doing any harm," she told Le Parisien newspaper.

But "things have evolved a lot in the past 20 years," Frank Mathais of the French toy chain, Grande Récré told The Telegraph, pointing at how some of the year's most popular gifts among boys were rainbow loom bracelets.

"Are the toys sexist or sexed (male or female)? It's not the same thing," he said.

Meanwhile, the project comes a week after another group of feminists protested the separate placement of gender toys in a Toys "R" Us shop in Paris.

"Sexed toys like science kits for little boys and dining or makeup sets for little girls are a shocking regression. It sets a disastrous example and restricts children to stereotypes," Roselyne Segalen, member of feminist group les Chiennes de garde, said.