Do you use Styrofoam balls to model your systems? [closed]

I found a couple of styrofoam models for:

Windows 95

and

Lotus Notes

(if that helps)

Actually, here’s a Tom Love case study that shows a couple of his models.

This model may represent the least
expensive CASE tool on the market —
materials cost $20.35. It was more
useful than any CASE tools I have ever
used.

We used it in three important ways.

1. It fixed the number of classes that we would deliver in the finished
   application and we did not allow new
   ones to be added, unless existing ones
   could be removed.

2. It was a very useful way to publicly document which classes had
   been code reviewed (blue ribbons) and
   tested (green ribbons).

3. It helped everyone understand what was being built and how much time and
   effort it takes to do testing,
   documentation and code reviews.

Edit: photo of object model

alt text http://img686.imageshack.us/img686/82/stryrofoamobjectmodel.jpg