Algodoo

This is the new version of my crane. I raised it up higher so you can stack more, and took TC42's advice to make the claw mouse-controlled. Left mouse button to close it, right mouse button to open. I recommend setting it to the drag tool to cause the fewest problems.

In later versions, I'm thinking of making a static control box for the mouse. There are issues with inadvertently panning the camera with the right mouse button.

Comments, questions, criticism welcome as usual.