Avi Bryant wrote:
> From what I can tell it's a 3d modeling tool for kids based on the  
> Teddy 3d sketching stuff (http://yap.jp.land.to/yas/pukiwiki.php?%5B% 
> 5BPapers%2FTeddy%5D%5D).  Am I close? :)

Close, but no cigar ;-) Plopp is a product based on the 3D painting 
system that's also in Croquet which is quite a bit different from Teddy. 
In Teddy, you draw an outline first and then you paint on the surface of 
the 3D extrusion. In Plopp you paint the entire object at once. This 
idea originated in the masters thesis of Jana Hintze at the games group 
in Magdeburg (see 
http://isgwww.cs.uni-magdeburg.de/games/projekte/kindervorlesung/jive.html).

Cheers,
   - Andreas