Gravity tracks, mazes, cause-and-effect runs
Grades: K–3; TK with large-ball system
Independence: High with contained build area
Preparation and setup: Use contained trays or a defined build area so balls do not enter walkways.
Independent work: High-interest engineering option with immediate testing.
Storage and reset: Count balls in/out; use larger balls for younger grades.
Lesson flow: Teach the setup and visual routine first, then open as a rotating station when students can begin, work, and clean up independently.
Safety and cleanup: Follow the teacher notes and supervise any activity marked Teacher-supported.
Supply:
https://www.google.com/search?q=classroom+marble+run+set
Tutorial: Marble run STEM challenges
https://www.youtube.com/results?search_query=marble+run+STEM+challenge+kids