This project is not only for your kids, it can also be a backyard decor when built nicely! Are your kids are into cars or racing? Here's a beautiful backyard project that your kids will love! This DIY project is a miniature version of a real race track. It has real plants, grass and even roads made with cement mix for that added touch of authenticity. Do you have an empty spot in your garden for this DIY outdoor race car track?