Pool Noodles. The end. No, I’m totally serious. Cut a slit down the length of a hollow pool noodle (don’t use the solid kind… they won’t grip the edge of the hearth). Place the pool noodle on the edge of the hearth and BAM! Instant noggin protector. I searched and searched for options for our brick hearth, but everything was minimally protective, hideous, and so, so pricey. Well, of course the cheapest trick worked! It’s not the most attractive option, but you could even cover the pool noodle in fabric if you really hated the color. Sometimes the cheap tricks are the best tricks!