I think some just get it and some do not.
My gifted DS now 6 loved puzzels, mazes connect the dots and did not have to be taught and he would do 100 piece puzzles at 2/3.
Now my 2 year old couldn't do a 3 piece puzzle to save his life.
He just says "oh no broken" He is not ready for sure.
So the time will come when they can do them and depends on the child.