The Cogwheel is used in the map House to get the Master Key. There are 2 Cogwheels; a red cog and a rusty cog. They are used in the Playhouse in the yard.
How to Get
In the Bathroom on the second floor. It is in the sink.
- Go to the secret wooden area behind some boxes on the second floor.
- Get the Winch Handle next to the table
- Go to the yard and use the Winch Handle on the well and the Red Cog should come up