Children create slides with turns and bumps using paper for marbles to glide through, exploring motion, speed, and cause-and-effect through hands-on play and experimentation.
Divide the children into groups of 2–3. Begin with a story, such as young designers building a roller coaster track for marbles to race through with twists, turns, and bumps. Provide each group with paper sheets, tape, and marbles, and explain that their challenge is to create an obstacle course where the marble glides smoothly from start to finish. Encourage them to fold, roll, and bend the paper to form slides, tunnels, or barriers that make the course exciting. If they face difficulties, give hints like: How does folding paper make it stronger? What happens if the slope is too steep or too flat? Where can you add twists to slow the marble down? Once finished, allow the children to test their marble tracks, make improvements, and race marbles through the courses. This way, they explore motion, speed, and cause-and-effect through playful hands-on design.