If you have ever tried to start a fire with a magnifying glass you may have got your paper to get smoking, but not to light. But it's simple to succeed in doing so with a easy trick! https://youtu.be/F6rdlnpPhqs
Step 1: Get Your Stuff.
You'll need a peace of paper, a magnifying glass, and a black sharpie marker. ( don't cut yourself:)
Step 2: Lighting the Fire.
Focus the dot of light on the black dot you just made. ( A bigger lens will collect more sunlight.)