Child-Proof Door Lock

I Created this to Prevent My child from being Able to Unlock the Front Door from the Inside. The box loosely fits over the Peanut shaped Thumbturns so cannt turn the actual latch when a child turns the box. This will still allow the key part of the lock to work as its not affecting the lock itself. This is to Cover the Peanut Shaped Thumbturn Latches. Step 1: Slide the box over the thumbturn Step 2: Slide the Cover into the slots on the box- This goes over the Barrel (Approx 16 mm wide). Step 3, slide the cover latch into the cover protrusions as shown in the Photos. Note: I have increased the size of the Lid lip and the height of the main box since the photos.