Acrylic (with brand names like Acrylite, Plexiglas, Lucite, Optix) is an excellent material for supporting your super cake creations.
Clear acrylic is an FDA approved material and its edges can be polished to a glass-like shine.
There’s two grades of acrylic: cast and extruded. For your larger flat pieces you can save money by asking for extruded acrylic. If you need near-optical perfection then you’ll end up using cast acrylic – a bit more expensive but absolutely faultless. How do you glue everything together? You need acrylic glue – click here for an article that might help you.
Here’s some ideas I found on line (click on the images to go to the website):