What can you catch on fire without a lighter?

You can catch various materials on fire without a lighter by using alternative methods such as friction, sparks, or heat sources. For example, dry grass or leaves can ignite through friction by rubbing sticks together, while flint and steel can produce sparks that ignite tinder. Additionally, using a magnifying glass to focus sunlight on kindling can also start a fire. Always exercise caution and follow safety guidelines when attempting to create fire.