I am not a Debian developer (yet?) but I plan to package leocad
[http://leocad.gerf.org/]
It is a gtk+ CAD program that uses toy bricks similar to those found
in many toys (but no particular brand :). It was written by Leonardo
Zide.
It is GPL'd but this is hard to learn from the website.
--
Pat Mahoney <pat7@gmx.net>
"We waste so many moments standing on convention"
-- Nick Hexum