Execution Method

Since both my ideas can be placed at the same location, that is a mirror and a toilet door,  I thought of combining it as a piece of art. Of course, it is both separated design and placed opposite but easier for the audience to see the connection. Also, it can both be made with the same shape.

One side is shown the door and the other is the mirror. As for the door, I thought of doing it lenticular. Instead of doing it 3D lenticular, I'm doing it in a zig zag pattern images, which is two images in different angle of the same plane. However, more research on how it can be done is needed. 

Example of two side images

makezine.com (2009)

The door with two angles…. where image 1 can be seen by adult and image 2 can be seen at children height.

Image 1 is a smiling stranger but has a knife holding on, to show don't trust any stranger while image 2 is a message to kids, the candy looks nice but the person -evil looking stranger- giving it is scary.

 On the other hand, the mirror is placed at the lower side is because that's about the average kids height.

To make both of it stand, I would propose to use stereofoam at the bottom to keep them stand.

Reference:

Lenticular image from two photos | MAKE. 2014. Lenticular image from two photos | MAKE. [ONLINE] Available at:http://makezine.com/2009/01/13/lenticular-image-from-two-photos/. [Accessed 19 September 2014].