The Coolest Building Toy ever. eBay is a godsend. 27 years after Construx debuted, it is still widely available. The pieces, made of ABS Plastic, retain their bright colors and most definately a fun factor.
In addition to making a bad-ass custom Keyboard & Mouse tray, there are many ways to play...
How tightly can one pack them in a box?
Given a random set of pieces, can you connect them?
If so, what is the smallest area you can do it in?
Make a structure that can hold x pounds, arranging the beam's directions to keep the structures intact)
A variant on the egg-drop engineering challenge
Merry Christmas everyone!