Focus the Sun's rays in the palm of your hand!. Hand any science teacher a parabolic mirror, and the first thing they want to do is start a fire. (Trust us. We've met thousands.) Get right to the point with this mirror, originally designed for the hikers and campers!. It's equipped with a prong that holds fuel right at the focal point. When held in bright sun, it generates smoke in seconds! But don't stop with ordinary paper fuel. Try our favourite demo - the mini-marshmallow roast. Stainless steel construction. Measures about 115mm in diameter. This product is not a toy. Adult supervision required.