Hot Wheels is an American brand of scale model cars and slot car racing kits introduced by American toymaker Mattel in 1968. It was the primary competitor of Matchbox until 1997, when Mattel bought Tyco Toys, the former owner of Matchbox.
Many automobile manufacturers have since licensed Hot Wheels to make scale models of their cars, allowing the use of original design blueprints and detailing. Although Hot Wheels were originally intended to be for children and young adults, they have become popular with adult collectors, for whom limited edition models are now made available.
Through the years, Hot Wheels cars have been collected mostly by children. However, since the late 1990s, there has been an increase in the number of adult collectors. Mattel estimates that 41 million children grew up playing with the toys, the average collector has over 1,550 cars, and children between the ages of 5 and 15 have an average of 41 cars.
According to en.wikipedia.org; adweek.com. Source of photo: internet