Ok, I'll bite. I'm not sure the "best" evidence for creation would ever be in the form of a scientific testable theory, but since I think that's the kind of evidence you want, I'll throw some out there. Here they are, in no particular order.
1. In 1980, Mount St. Helens erupted. Sometime following the eruption, a canyon on the north side of the mountain was cut in a matter of hours. The canyon is 1000 ft wide and 140 ft deep and looks like a miniature version of the Grand Canyon. Evolutionists say the Grand Canyon was cut over thousands to millions of years. This new canyon is very strong evidence that it could have been cut in hours or days by a huge amount of water, just as creationists have been saying all along.
2. In 2005, an NC State Paleontologist discovered soft bone tissue in dinosaur bones. The scientific community immediately responded, many saying that we have a lot to learn about bone preservation to explain how this tissue lasted that long as a fossil. Wouldn't an open minded scientist say that this could be evidence that the bones aren't as old as we think? That thought was immediately thrown out as not possible simply because it doesn't agree with current evolutionary models. (so how many other such evidences are thrown out because they don't agree with current models?)
3. Back to Mt. St. Helens: Since the eruption, several dating methods have been used on rocks in that area. Since we know when the eruption occurred, we know how old the samples are. The dating methods have given answers all over the chart, many saying they are millions of years old, when we know the samples are only decades old. This has drawn dating methods into question. If the readings aren't accurate for young samples, how do we know they are accurate for older ones? (
http://www.creationism.org/articles/swenson1.htm)
My lunch hour is over, so I'll just post a link with some other thoughts on evidences for a young earth. I know some people will be upset that it is a Christian website, but oh well.
Evidence for a Young World
| Answers in Genesis