1Since being introduced in 1968, more than 5 billion Hot Wheels cars have been produced, making it the number-one toy in the world, with 10 cars sold every second. And it's not just for kids-the mini die-cast cars are also avidly sought by collectors worldwide. Today Hot Wheels continues to race into the future with live attractions, digital gaming, and even developing self-driving cars with AI software. Filled with energetic imagery, Hot Wheels at 50 vibrantly conveys the rich panoply of dynamic designs and thrilling experiences of this quintessential American toy.