Sugar glass

"All you need to do is melt some sugar."

Yeah, there's a lot more than that involved in making sugar glass.

You need to make sure the 'glass' remains amorphous so it stays translucent - which is is a little tougher than it seems. 

And the sugar shouldn't actually be sucrose but rather isomalt.

...and the stuff you make isn't exactly safe to break across a friend's head.

Not a lot of science presented in that first video, so let's try another one.

We get a little more science here with an explanation of amorphous versus crystalline materials, disaccharides, and glucose/fructose monosaccharides. It also avoids the use of isomalt and just uses sucrose, water, cream of tartar, and corn syrup. 

The production value of the above video is a bit lower, but there's more science explanation, at least. The video ends with a promise that 'next week' he'll be back with a video making isomalt sugar glass and molds to make Halloween shot glasses and beer bottles.

Sadly, next week never came as the channel hasn't uploaded another science video since this one four years ago. There have been a couple of other videos uploaded, but never a science tutorial and not a sugar glass revisit.

Not a lot of science here, just Steve Spangler's minions playing around with making a hard candy sugar 'stained glass' panel. It's cute and about as glassy as most of the sucrose-based glasses in the above videos.

That's not sugar glass. That's just melted candy.