Quote Originally Posted by GAMEchief View Post
I really don't get it. It must be a foreign joke.
It's a homonym of sorts. The first three (red, blue, and yellow) are meant to throw the person off and make them over think it a bit as the obvious answer would be "green bricks". But the correct answer is glass. You know, greenhouse, grow some plants, some flowers, probably can't go through a Harvest Moon without seeing one.