"Paddle to the Sea"
Back in the day this is how we learned Science. This was my favorite School movie ever as a kid. No Blu-Ray, DVD, VHS or BETA here. It was played in the classroom with an honest to goodness movie projector and it's still a great learning experience for kids. After 40 years or so I finally found it on youtube, go figure.
At Lake Nipigon, Canada, a native boy carves a wooden model of an Indian in a canoe and sets it free to travel the Great Lakes to the Atlantic ocean. The story follows the progress of the little wooden Indian on its journey through all five Great Lakes and the St. Lawrence River, finally arriving at the Atlantic Ocean. Paddle To The Sea