Non-Electric Cars
Students design gravity-powered cars and test how far they can travel on a shared ramp. This challenge encourages creativity, hands-on building skills, and a basic understanding of forces and motion.
Grade 2 and below
Rules：
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Your car must move only by gravity. Once you let go, no pushing is allowed.
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Your car must be small enough to fit inside a 20 cm × 10 cm space.
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Each team gets 3 chances. We will use the longest distance your car travels as your score.
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Everyone will use the same ramp and same ramp angle, so the race is fair for all.
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Special Notes: Before the real race starts, you may test your car to make sure it works the way you want.
Creative Toys / Robots
Participants build imaginative toys or simple robots that can move on their own, using basic mechanics or optional motors. This event highlights creativity, engineering thinking, and the joy of bringing ideas to life.
Rules：
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Build a toy or robot that can move on its own.
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The motion should come from simple mechanics (like gears or linkages) or a small motor (optional).
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Judges will look at creativity and how well your toy or robot works.
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Special Notes: Participants must submit photos of their project before the event.
Grade 3 and below
Sustainable City Engineering
Teams design a model of an eco-friendly city that uses renewable energy and smart infrastructure. This challenge promotes problem-solving, environmental awareness, and collaborative engineering.
Grade 4 and below
Rules：
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Teams will design and build a model of a sustainable city.
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Your city should include renewable energy sources, such as solar panels, wind turbines, or water power.
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Think about smart and efficient infrastructure—for example, good transportation, clean water systems, recycling areas, or green spaces.
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Try to include creative ideas that help protect the environment and make the city a better place to live.
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Judging Criteria：
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Usefulness: How practical and realistic your city design is.
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Completeness: How well all parts of your city fit together as a whole system.
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Technology Use: How thoughtfully you include science and technology elements in your design.
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Special Notes: Participants must submit photos of their project before the event.
Obstacle-Avoiding Robots
Students design and drive a remote-controlled robot that must navigate a course filled with obstacles. The event builds skills in engineering, control, and strategy as teams aim for the fastest clean run.
Grade 6 and below
Rules：
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Design and build a remote-controlled vehicle that can avoid at least three obstacles on the course.
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The goal is to finish the course in the shortest time without hitting any obstacles.
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The vehicle must be no larger than 25 cm × 20 cm × 20 cm (length × width × height).
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The course is about 2–3 meters long, with a lane width of 40–60 cm.
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Obstacles are approximately 15–30 cm tall and wide.
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For every collision, 5 seconds will be added to your time.
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Each team gets two trial runs, and your best time will be your final score.​
