Marble Run Building Block Set: Build Your Own Race Track

Design it, build it, then watch the marbles race. Kids snap the colorful blocks together into twisting tracks, funnels and slides, then test how gravity and slope send each marble down the course.

• Big, easy-to-grip ABS plastic blocks
• Choose 88, 176, 264 or 352 pieces
• Builds planning, problem-solving and engineering skills
• Rebuild it a different way every time
• Adult supervision recommended; small parts and marbles are a choking hazard for young children