Hot Wheels cars are small die-cast toy vehicles produced by Mattel. First introduced in 1968, they are known for their vibrant colors, unique designs, and high-speed performance on tracks. The cars are typically 1:64 scale, making them easy to collect and play with. In addition to individual cars, Hot Wheels offers a variety of playsets and tracks that allow children to create exciting racing scenarios. The brand has expanded to include themed collections, collaborations with popular franchises, and even limited-edition models, appealing to both kids and adult collectors alike.