Why Can a Cow Eat Grass? Grades 3-8 (DVD 29 min.) This video provides an in-depth look at the digestive tract of cattle, focusing on differences between cattle and human digestive systems. Take a journey into a cow's stomach and microscopically view the stomach contents... $12.00 Add to Cart Compare
Wind Power Grades 3-12 (Kit) Engage students with this engineering design challenge! Students will design and construct a barn, and create a wind turbine that produces electricity for the barn (lights up an LED light). This fun challenge is included in... $68.00 Add to Cart Compare
Wool Ewe Keep Me Warm? Grades 3-8 (DVD 27 min.) What is wool and where does it come from? How does it get from the sheep to the sweater? Why do shepherds use dogs to herd sheep? Why have sheep been important to humans since prehistoric times? These questions and many more are... $12.00 Add to Cart Compare
