Purely electric cars are not selling well. It's still hard to sell a car that drives at a maximum speed of 40 miles per hour, and needs to be plugged in after 25 miles. But one car company is trying. It's called ZAP, as in zero air pollution. Last month, Domino's Pizza started making its deliveries with the cars. The three-wheeled ZAP cars come in red, kiwi green, and a classic zebra stripe.