"Martha worries that her recent bouts of bad luck might be contagious! Uh-oh. Martha walked under a ladder--and then she broke a mirror--so now she thinks she's jinxed! Helen tries to explain that all the accidents are just coincidence. But when a nearby toddler stumbles and a waiter takes a clumsy spill, Martha worries that her bad luck might be rubbing off on everybody else. Will Martha be spreading bad luck for seven whole years?"--Publisher.

Martha and Helen decide to enter Wagstaff City's Go Green Go-Cart race. They do some research and visit the junkyard to find what they need to built a solar-powered cart. T.D. and Alice also visit he junkyard because they are making a wind-powered cart. Ronald and Reginald win the race with their cart "powered by a goldfish" but later they fight and crash into a post revealing that it is a lawnmower! T.D. and Alice are the real winners and Junkyard...