These Mini Work Vehicles do not require batteries. Drag the vehicle to a certain distance, then send it; it will automatically move forward. The vehicle body is made of durable plastic, which is lightweight, with smooth, curved edges. Features Mechanics: pull back Materials: plastic body Dimensions: 7 cm Made in China Novelty toys deliver a surprising mix of cognitive, emotional, and social development perks disguised as simple, low-cost fun. Many novelty items, like water-expanding polymer critters, rely on basic scientific principles. The unique textures, shifting weights, and visual anomalies of novelty items offer high-value tactile inputs. Because novelty toys are inherently unusual, they function as exceptional social icebreakers.