Science Guy
Hydraulic arm - use syringes, aquarium tubing, wood. Kids build a similar one at a 4H junk drawer robotics class and love it. Pencil top erasers at the end of the hand work well as grippers. Let them try it first with air in the lines instead of water - air compresses so it doesn't work as well. (Good to teach some about properties of liquids, solids, gasses.)
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More like a science project, but would be fun to try. Newton's First: with raw eggs. Pinner said: "ok, this is cool! Our family just tried it. I wish I had, had a camera for my husband's face when I knocked the pie pan! lol The kids think this is SO cool!"
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MIT puts videotapes of their courses, lecture notes, etc up for FREE! Amazing resource for high school teachers and college students. Another pinner writes "This is the link to my amazing physics professor's videos! Dr. Walter Lewin. He was the best physics teacher I ever had."
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