Water runs into the small trough until it is so heavy that it becomes overweight and tips over. The trough empties, the bell rings and the seesaw rocks back.
It rocks and rocks and rocks and can also be operated with sand, gravel or balls.
Water runs into the small trough until it is so heavy that it becomes overweight and tips over. The trough empties, the bell rings and the seesaw rocks back.
It rocks and rocks and rocks and can also be operated with sand, gravel or balls.