Continuity mistake: When Hank arrives with takeout food from Los Pollos Hermanos, Walt picks up a container, but in the next shot he isn't holding it. Also when Walt places a chicken breast on Skyler's plate, it disappears in the next shot, but re-appears in the shot after that. There is a lot of back and forth with the food in this scene. (00:11:45)
Other mistake: Walt takes new-born Holly into the garage to show her the money hidden behind wall insulation. He enters through a door that doesn't exist in the interior of the house. (00:15:00)
Chosen answer: I'm not sure how far you are into the show but he does eventually come up with a way to launder it (wont spoil it for you but rest assured, when he gets a lawyer the show gets much better!) and in the final season he also comes up with a way to give his children his money without the cops or the DA knowing it came from him.
The_Iceman