Trying to tackle Creationists head-on is usually a waste of time.
They ignore the millions of pieces of evidence supporting Evo,
Instead focus on anything that can cheer them up
But you can suggest a few things which might get some of them thinking for themselves.
"God used to be the best explanation we'd got, and we've now got vastly better ones. God is no longer an explanation of anything, but has instead become something that needs an insurmountable amount of explaining." Douglas Adams