1 A fun way to grab students attention when talking about Metals and their properties:
You definitely shouldn't mess around with mercury, but if you want a safe, similar, tactile experience, a metal called Gallium is widely available online. It's melting point is about 85 degrees, so with just a little heat, you can turn it from a solid, crystal-like state into a fun, reflective pile of goo. Here's a look at a few of it's properties and how it's used in the real world.
1 Plasma Cutting Pantograph: I have to make one of these for the school Metal Shop
...Update: In the process of building one out of alloy box section. The Pivots are designed to carry thrust bearings and multi directional ball bearing to supports for the 2 arms and reduce friction. Cant wait !
1 As a skills task I love creating high quality every day ideas in metal. Believe it or not the boys seem to enjoy the absurdity.
Here is an idea I have been pondering over for some time...a ridiculously over engineered project... like a Tape Dispenser. I have yet to create one in the school shop but brain storming ideas are coming thick and fast. here are some ideas to wet the apatite: