Burning Wood using magnifying glass

Today at science class, I learned that a magnifying glass can burn wood or paper. A magnifying glass can burn wood or paper because the light goes in the covex lens and the light gets squeezed so much there is heat. I also did the experiment at science class. After school, I picked up a lot of sticks and some stones. I asked my mom for a magnifying glass. Then she gave me a piece of newspaper and I lay it on the driveway. I lay the sticks like a real campfire. I put some bark and wood chips under the campfire and stones. Then I looked to where the sun was. I pointed the magnifying glass at the wood. Five seconds later, I saw smoke from the wood. It smelled like a real barbaque. Then, mom gave me some dry leaves. The sun went through the magnafying glass squeezed the light so much that it made leaves burn less than 3 seconds. Once I focused it on my hand and it was hot! I also burned newspaper. A guy at my school spent 30 minutes burning an old crayon he found. He pointed the magnafying glass at the crayon and it began to burn. We also saw some smoke and fire. The crayon broke in two pieces. I was out for 1 hour. Then I had to go back in ! I think burning stuff with a magnifying glass is cool and fun. I enjoyed it.