This article is from the Baby Proofing FAQ, by Sandra Smith, firstname.lastname@example.org with numerous contributions by others.
From: hardend@LONEX.RL.AF.MIL (Debbie D. Harden)
We, too, have an "evil" hearth. For awhile, a thick blanket draped
over the hearth worked well. Then James learned how to pull it off.
We received a mail-order cat. called "Perfectly Safe." In it they have
hearth bumpers you can purchase, but you have to call for a $
estimate. If you're interested, I can bring it in tomorrow and e-mail
you their number.