You can easily make your own magnetic pendulum.
I used a wooden board and cut it in the shape of a kite.
I drilled a hole in the back corner and put a stick in it.
Then I attached a ring magnet
to the end of a thin rod and used rope to fasten the pendulum to the stick.
Finally, I painted everything black and glued a thin metal plate on top of it.
Below three possible arrangements of magnets and the resulting pendulum movements.
The videos show how unpredictable the spinner is.
Example 1: Rays.
The pendulum follows the empty lanes between the magnet rows.