Start your engines! The Green™ Stack & Link Racers are ready to roll! These pocket-sized cars are the perfect size for babies and toddlers. The unique design allows the cars to be used individually, linked in a chain, or stacked up to form a tower. Each pint-sized car sports unique texture detailing for tactile stimulation, while the whole fleet features a super-eco design with no metal axles or external coatings. Made in the USA from 100% recycled plastic with no BPA, phthalates, or PVC. Dishwasher safe.