The best system we have seen uses Velcro on the back of the laminated cards and a felt board.  Make sure the image is very simple, focused only on the word you are trying to communicate and uncluttered by other objects.  If you have any artistic skill, a hand drawing of a house is probably just as good as a picture of a house. These images are mounted on the board and presented to the child.  You then point to the image as you are talking about it.  These are great for communicating sequences and building vocabulary. 

Unless you are very creative and dedicated to this, you and your child are going to need help.  The Picture Exchange Communication System (PECS) is an amazingly complete collection of graphic images used to convey simple and complicated concepts.