Malcolm in the Middle question? Chemistry?

a href="http://www.megavideo.com/?v=7YJUYTWQ" rel="nofollow"http://www.megavideo.com/?v=7YJUYTWQ/a . If you skip to 00:16:27 in, you see Malcolm pour a liquid into another liquid. Then he puts a plug in the two and stirs it. The plug is attached to a light, that glows very bright when in the solution. What are those two liquids called?