This project is not only for your kids, it can also be a backyard decor when built nicely! Here's a beautiful backyard project that your kids will love! This DIY project is a miniature version of a real race track.
Reuse an old tree to make a log pathway in your garden. Good use of "yard" trees and other wood that can't be milled; works much better in climates without termites. Good drainage under the log rounds will make the path last longer.