Hiya!! We used to make our sheets of plastic into them in design lessons. I can't use anything too heavy. If you've got a book you've finished w/ that nobody else wants (I've plenty) you could use the cover, cos when it flaps it makes pretty much the same noise. I found this out when I got too hot. I was so pleased. It made my day !! J (little things, etc.) Just be careful of shaking it too hard when wearing certain clothing, esp. if you're a woman --- cos it's not just yer board that wobbles! (   .)( .   )