During the Second World War, some new types of toys were created through accidental innovation. After trying to create a replacement for synthetic rubber, the American Earl L. Warrick inadvertently invented "nutty putty" during World War II. Later, Peter Hodgson recognized the potential as a childhood plaything and packaged it as Silly Putty. Similarly, Play-Doh was originally created as a wallpaper cleaner. In 1943 Richard James was experimenting with springs as part of his military research when he saw one come loose and fall to the floor. He was intrigued by the way it flopped around on the floor. He spent two years fine-tuning the design to find the best gauge of steel and coil; the result was the Slinky, which went on to sell in stores throughout the United States.
Traditions within various cultures promote the passing down of certain toys to their children based on the child's gender. In South American Indian communities, boys receive a toy bow and arrow from their father while young girls receive a toy basket from their mother. In North African and Saharan cultural communities, gender plays a role in the creation of self-made dolls. While female dolls are used to represent brides, mothers, and wives, male dolls are used to represent horsemen and warriors. This contrast stems from the various roles of men and women within the Saharan and North African communities. There are differences in the toys that are intended for girls and boys within various cultures, which is reflective of the differing roles of men and women within a specific cultural community.
Digital toys are toys that incorporate some form of interactive digital technology. Examples of digital toys include virtual pets and handheld electronic games. Among the earliest digital toys are Mattel Auto Race and the Little Professor, both released in 1976. The concept of using technology in a way that bridges the digital with the physical world, providing unique interactive experiences for the user has also been referred to as "Phygital."
Girls gravitate towards "music, clothes, make-up, television talent shows and celebrities". As young children are more exposed to and drawn to music intended for older children and teens, companies are having to rethink how they develop and market their products. Girls also demonstrate a longer loyalty to characters in toys and games marketed towards them. A variety of global toy companies have marketed themselves to this aspect of girls' development, for example, the Hello Kitty brand, and the Disney Princess franchise. Boys have shown an interest in computer games at an ever-younger age in recent years.
The earliest toys are made from materials found in nature, such as rocks, sticks, and clay. Thousands of years ago, Egyptian children played with dolls that had wigs and movable limbs which were made from stone, pottery, and wood. In Ancient Greece and Ancient Rome, children played with dolls made of wax or terracotta, sticks, bows and arrows, and yo-yos. When Greek children, especially girls, came of age it was customary for them to sacrifice the toys of their childhood to the gods. On the eve of their wedding, young girls around fourteen would offer their dolls in a temple as a rite of passage into adulthood.