Re: frog becoming a giraffe
I have a bunch of creationists in my family, and even the educated ones eventually retreat to a Matrix-like circular logic if pressed hard. An example would be radionuclide dating - they will eventually argue that the world is really 6800 years old but all the isotopes & fossils and such were made by the creator to make the Laws of Physics make it look like things (like the planet & universe) are billions of years old
Now, some creationists are fundamentalists and thus interpret the Bible literally.
Some will (if they understand) argue that the two DIFFERENT creation stories in the Bible are the same (and even written by the same author, or at the same time!)
Other people believe in creation, but allow for evolution (e.g. need to explain Big Bang, the "days" in the creation story are just phases [after all, a thousand years is but a day to God].)