Extreme heat is currently gripping much of the United States, including Las Vegas, where it’s hot enough to melt crayons outside. A time-lapse video shared by the National Weather Service on ...

He'll tell you where it all starts. Liam: Wax is the main ingredient used to make crayons. It arrives in small flakes, so it's easier to heat up and melt. Harry: It feels a big hard and squishy.