"Evolution" mixes two things together, one real, one imaginary. Variation (microevolution) is the real part. Creationists have always agreed that there is variation within species. What evolutionists do NOT want you to know, is that:
There are strict limits to variation that are NEVER crossed, something every breeder of animals or plants is aware of. Evolution theory puts no limit on what mutation/natural selection can invent, saying that everything in nature was invented by it. But the invention of new parts or systems by mutation has NEVER been witnessed, nor has it EVER been accomplished in a biochemistry laboratory.
Evolutionists will tell you we cannot see evolution taking place because it happens too slowly. A human generation takes about 20 years from birth to parenthood.We don't have these problems with bacteria. A new generation of bacteria grows in as short as 12 minutes. But they never turn into anything new. They always remain bacteria.
Natural selection would not choose parts that did not have all their components existing, in place, connected, and regulated because the parts would not work. Thus all the right mutations (and none of the destructive ones) must happen at the same time by pure chance. That is physically impossible.
So what Evolutionists want you and I to believe, is that if we tied a hammer to the tail of our dog, and let him run loose in a lumber yard for millions of years, he would build a house from all the building materials.