Spiv made a ducting out of a twix box before, and it worked fine. I'll try to dig up some pix. I think you're safe - but i'd watch it for a few minutes before i went walking away - just to be safe ...

And cardboard is no exception as gardening experts have revealed five ingenious ways of using this disposable material for good in the garden, from getting rid of weeds to enriching soil.

Most of his mesmerizing sculptures are made with just cardboard, glue, and a knife. Warren shows us how to build our very own robot helmet, using the techniques he's perfected throughout his career.