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E**K
Not what I was looking for
I was hoping a small battery operated motor which would pull the paper at a certain rate. When you are truly observing a scientific experiment the human element must not be in the equation. A student pulling on the paper will change by the person in the experiment and frequency will be a constant instead being uniform during the experiment. A graph roll and a small rev engine will make the experiment a more knowledgeable experience.
L**Z
No stylus
Poorly designed and did not come with a stylus.
H**.
Five Stars
Worked just fine. Perfect for my daughter's science project.
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