For toy safety, every country has its own regulations. But since the globalization and opening of markets, most of them try to harmonize their regulations. The most common action for younger children is to put toys in their mouths. This is why it is of utmost importance to regulate chemicals which are contained in the paintings and other materials children's products are made of. Countries or trade zones such as the European Union regularly publish lists to regulate the quantities or ban chemicals from toys and juvenile products.
More complex mechanical and optics-based toys were also invented. Carpenter and Westley began to mass-produce the kaleidoscope, invented by Sir David Brewster in 1817, and had sold over 200,000 items within three months in London and Paris. The company was also able to mass-produce magic lanterns for use in phantasmagoria and galanty shows, by developing a method of mass production using a copper plate printing process. Popular imagery on the lanterns included royalty, flora and fauna, and geographical/man-made structures from around the world. The modern zoetrope was invented in 1833 by British mathematician William George Horner and was popularized in the 1860s. Wood and porcelain dolls in miniature doll houses were popular with middle class girls, while boys played with marbles and toy trains.
In an effort to reduce costs, many mass-producers of toys locate their factories in areas where wages are lower. China manufactures about 70 percent of the world’s toys and is home to more than 8,000 toy firms, most of which are located in the Pearl River Delta of Guangdong Province. 75% of all toys sold in the U.S., for example, are manufactured in China. Issues and events such as power outages, supply of raw materials, supply of labor, and raising wages that impact areas where factories are located often have an enormous impact on the toy industry in importing countries.
Research on the repercussions of gender in toys suggests that play should be encouraged to be more gender neutral in order to work towards a desegregation of the genders. Too, researcher Carol Auster and Claire Mansbach promote that allowing children to play with toys which more closely fit their talents would help them to better develop their skills. In terms of parental influence, a study found that parents who demonstrated some androgynous behavior have higher scores in support, warmth, and self-worth in regards to the treatment of their children. Even as this debate is evolving and children are becoming more inclined to cross barriers in terms of gender with their toys, girls are typically more encouraged to do so than boys because of the societal value of masculinity.