This article is from the Baby Proofing FAQ, by Sandra Smith, firstname.lastname@example.org with numerous contributions by others.
From: lauraf@notavax.Jpl.Nasa.Gov (Laura Floom)
If you cant baby proof it, then the best thing to do is to teach him
how to climb up and down safely. I have some cement steps in my front
and back yard, and that's what we did.