Create the background in styrofoam



 Cage, built in plywood, Photo © Gunilla
The pieces that shall become shelves
For extra stability I attached some pieces of plywood to the back before I arranged the styrofoam.




 Cage, built in plywood, Photo © Gunilla

The pieces of plywood screwed on to the back wall



 Cage, built in plywood, Photo © Gunilla
Painting
First I used putty to fill out any holes then I sandpapered everything.
I painted the cage twice in a non-toxic water based color (ask at the store which one you shall use).
Make sure you tell them that you shall paint a cage so you *really get* a non-toxic paint...



 Cage, built in plywood, Photo © Gunilla
The styrofoam is glued on
I bought 4" styrofoam and sawed it into sufficient pieces.
I started to fasten the styrofoam underneath the shelves.




 Cage, built in plywood, Photo © Gunilla
Use a special glue
You have to use special glue - otherwise the styrofoam will melt!
Ask at the store, which one you shall use.




 Cage, built in plywood, Photo © Gunilla
More styrofoam
It takes quite a bit of styrofoam when you build a rock wall...




 Cage, built in plywood, Photo © Gunilla
Even more styrofoam..!
This will be a cave




 Cage, built in plywood, Photo © Gunilla
It takes some time...
It takes some time (and gets quite messy! ;) to cut and fit all the pieces.
Try to do this outdoors if possible otherwise you'll have styrofoam everywhere..!

I used different thickness of the styrofoam to create variation.
The styrofoam doesn't need to be as thick at the back wall for example.




 Cage, built in plywood, Photo © Gunilla
"Scratch" it!
When all the styrofoam is securely glued on the back wall at the plywood, and everything has dried
for at least 24 hours, it is time to create a "natural surface" that looks like a rock wall.

I used a knife and my imagination to create variation in the styrofoam.




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