Melt a stack of pennies, burst a glass bottle, damage various food items, and incinerate wood using the power of the Sun! This 4 foot magnifying lens will melt concrete, and nearly anything else that gets in its way.
Some quick links to a few of the materials I used:
[✓] Small Fresnel Lens: http://amzn.to/2cEa9Sy
[✓] Apple beer: http://amzn.to/2cVKC3C
[✓] Bottle Top Stoppers: http://amzn.to/2cEcJrS
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