This awesome looking take on the heavy infantry Manalorian helmet is made out of materials you can pick up at your local hardware and hobby store. Bonus: you can build it in a few days.
Remember this dude?
Now, thanks to Odin Makes, you can build his helmet. I like his tutorials because he showcases projects that aren’t daunting and don’t require an insane amount of specialty power tools. This recreation is made of foam, contact cement, paint, shoe polish, and a tinted welding visor (there’s a full list over on YouTube, plus his pattern). The result would look great on a display shelf or as part of a Mandalorian cosplay.
If you prefer The Mandalorian’s helmet and more complex build you can try this tutorial from The Welding Geek…