Elephant tin toy with somewhat mysterious game

I'm not entirely sure how the game part of this nifty tin toy works, but I sure love all the stuff going on here.

From the product description:

This busy elephant sits atop a colorful panorama of circus animals. The propeller on his nose spins. Tin balls are lifted by an elevator to the top where they roll down a chute that drops them through a spinning drum that the elephant holds between his hands. This is a very colorful tin toy with great action.

Here is a link to the tin elephant with ball game.

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