The Labo-ratory: VGC OFFICIAL Labo Thread (Vehicle Kit out now)

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sundin13 said:
Not really sure what the criticism is of cardboard. It is light, it is pliable, it is cheap, it is replaceable, it is easy to store and it is a great craft material...

Plus it's far more environmentally responsible than using mass amounts of plastic instead. At least cardboard's biodegradable.