I love square foot gardening!  We began reading Mel Bartholomew's book and gathered some good information before we got started, and then found this raised bed plan from Lowes.  It was so easy to build and turned out so cute!  The most expensive part was the soil.  We used a mixture of bagged garden soil, peat moss, and Black Kow compost.  The box was only about $25 to build, but I think the soil was around $50 for a total of about $75 per box.  Here are some pictures showing plant progression so far!