This is a note to Melissa Furash re: pvc pipe.  I just bought a 10 foot
length of pvc drainage pipe at Home Depot for $3.97.  The pipe is a cheap
grade and has little ventilation holes in it.  It is not clear, but the
fuzzies race through it so fast it doesn't matter.  This type of pipe comes
with t-shaped connectors for about $150, so we hack-sawed the 10 foot pipe
into lots of sections and built quite an a-maze-ing maze.
 
Katherine
[Posted in FML issue 1565]