We received a yearly supply of fatwood from my wife's late mother, a thoughtful gift as she knew we love to sit outside on a slightly chilly night around our firepit, and fatwood is a great fire-starter. I thought this was a manufactured product that added chemicals to the pieces of wood, but that's not at all true. Fatwood, as you can read more about at the link below, is made from stumps of coniferous trees (e.g. pine) and over time the wood's sap, the volatile hydrocarbon terpene, hardens into a resin, making it no longer sticky. With a few of these, anyone can start a blazing fire in no time.