This video from Eric Hovind (Kent Hovind‘s son) encapsulates every Creationist argument in a nutshell.
If you can’t think of the answer, God did it. Their ignorance is proof of God’s work.
How to destroy their argument in a word?
You know, if you have a full minute, it might be useful to take five seconds and do a quick Google search.
(Thanks to Sean for the link!)