[confam]

Just an update on 'where to find in London, ON': Wal-Mart has white cubes for about $20, and 'latte' couloured ones for about $3 more. Rona sells Coroplast, though it is not called that (but as mentioned before, if you describe it as being just like corrogated cardboard, but made of plastic, they know what you're talking about). It is in the same section as the plexiglass and I believe a 4x8 sheet was about $20. They had about 3 or 4 different colours. That size was plenty big enough to fit our 2x4 grid cage, then we bought wire shelving (in the storage department) to cover our cage with - we have cats. All in all, I would say we spent about $50 - $60 for the complete setup, which is a steal compared to what you would pay for the largest cage a pet store would sell, which wouldn't be nearly as big.