The Official Google Blog’s entry, I’m feeling silly includes:
An email went out to cohorts. Their orders came in. Three weeks later, I had an eighth of a ton of Silly Putty delivered to my desk.
Naturally, we were all curious to see what 250 pounds of Silly Putty would look like, so before distributing the stuff, we put it all in a single pile to see.
Definitely worth the read, purely as a matter of scientific interest, of course.