Giant hand model
A giant hand that you can move the fingers by pulling on the tendons.
A great way to teach how muscles and tendons work as you can't push a tendon, so you have to find another one to pull, as well as the anatomy of the hand and arm.
This works great as a supervised demonstration, but it could be built as an exhibit for a museum.
This version was built a long time ago in a student living room, we could do a much neater job today, but it is such an effective demonstration we wanted to list it.
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Exhibit