I truly like taking all the old scraps for demos. I take a small steel box with screw on lid and fill it with small scraps bits and bobs hammer it all together and flux it and screw on the lid and into the fire it goes, welding heat and poof you have a block of steel to do with as you please. If you what to have real fun save your paper clips we have made several letter openers for folk out of paperclips all welded together.
Firegnome