Modarri’s new line of Monster Trucks have mix-and-match parts. Thanks to the Modular Building System made popular by the Ultimate Toy Car, the trucks have retained screws that won’t fall out. They loosen with the hex tool provided to swap out one part (or many) for another. The M1 Space Invaders Truck has more than a dozen interchangeable parts: the chassis, hoods, fenders, frame, tires and rims. Two other sets are available to create mashed-up designs using parts from all three! Designing and building cars is fun at any age, says Modarri. Sharing parts and exploring new creations creates quality time with family.