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Two comments -

1. We had a billiard table in our science of sports exhibit for 8 years (geometry of trick shots).  We had no trouble with injury or damage form the loose pool balls, either.  I think 5-7 pounds is a bit much, though.

2. To Ian's point about a thinner fabric - you might try Skyline Displays.  They are a tradeshow company that we've used for some stretched-fabric text panels.  Sort of a thick lycra or spandex kind of material.  They can print a nice grid (or even a star field) on a piece for you to stretch.  Holds up pretty good for us so far; we've also used it for the base of some exhibit pieces to give it a curved, organic 'skin' sort of shape.  We were worried about intentional or unintentional damage, but no damage in a very heavy-attendance year.

- Dennis Bateman
Carnegie Science Center

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