SCIENCE CRAFTS for KIDS | Ruff Ruffman Friction Racing | PBS KIDS for PARENTS
Subscribe to me here on Youtube! Ruff Ruffman loves to explore the world through science and engineering. You can explore the concept of friction by conducting an investigation using a toy car and ramp. See what you need to get racing: http://bit.ly/2DQrmFw
Let us know what else you incorporated into your ramps by commenting below.
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