Refer to this guide if you wish to find them all without entering codes. Just scroll down a bit and you will find guides for all collectables in LSW3:
http://www.videogamesblogger.com/2011/03/23/lego-star-w....htmFor those who can't find the other linked pages, read the page in the middle and scroll down till you see the blue links to Lego Star Wars 3 red brick locations etc.