It's not a new concept, but transforming a Styrofoam object into an aluminum one — known as lost-foam casting — is a fascinating technique.
In a recent video, Grant Thompson, also known on his YouTube channel as "The King of Random," showed how this worked on a Styrofoam gun using what he called "a little bit of magic."
He started by cutting the outline of a handgun on foam board and then glued the pieces together to form the 3-D object.
Next, he took some play sand — just the traditional sandbox variety — and buried the gun, leaving just a bit of a riser showing. He made a little "volcano" out of moist sand around the riser.
Then, he poured melted aluminum, which he made from recycled cans, into the volcano area.
Just 10 minutes of cooling later, he uses pliers to take his creation out of the sand.
Thompson filed down some of the rough edges with sandpaper and this was the end result.
"And that's how simple it is to make anything you can think of into solid metal," he said.
Watch how it's done in this less than three-minute video: