Help?

I am trying to make some silhouette prints from some photos à la my friends at Young House Love and Our Humble A{Bowe}d:

And I am bad at it.  This is probably because I don't have fancy editing software like Photoshop nor do I have a steady tracing hand on the mouse.  I might have to cave and do it the old fashioned way, if the old fashioned way is putting a piece up paper up on the computer screen and tracing.

But before I do that, any suggestions on creating 8x10 white silhouettes against a light colored background out of the main subjects in these pictures and maybe some others?  I even have mats and frames already!