Allinone robotic chassis kit for building a smart car suitable for learning and competitions. The kit combines plastic and metal components with two DC reduction motors rated 148 ratio at 3V to provide a stable platform for common robotics experiments and challenges. Key benefits Ready platform that reduces setup time for lessons and contests, letting users focus on sensors and control algorithms. Durable construction using plastic and metal parts for repeated assembly and testing. Reliable motor performance from two DC reduction motors 148 ratio at 3V, useful for consistent speed control and repeatable experiments. Versatile for multiple robotics functions including tracking, speed measurement, and obstacle detection. Important attributes Function: Designed to support tracking, speed measurement, and obstacle detection projects. Materials: Plastic and metal components for structural parts and mounting. Performance: Two DC reduction motors with 148 reduction ratio at 3V provide steady torque and predictable response for control tasks. Use case focus: Education, project development, and competition preparation. Practical scenarios Line tracking project for classroom exercises or competition runs that require precise follow algorithms. Speed measurement and motor control experiments to evaluate control strategies and tuning methods. Obstacle detection and avoidance challenges for navigation practice and course completion in events. This kit provides a practical chassis base that supports experimentation and skill development in robotics without requiring a complete custom build.