My favorite channel is Mini Gear. They make mostly cardboard projects. Their first video was posted 5 years ago.
Some of their videos
How to Make BIG Marble Run Machine from Cardboard
This video is them making a pencil box. This project of theirs is also out of cardboard.
Puzzle Shift Create – Creator type: Engineer!
This channel is a great example of an Engineer. In Innovative Arts class, students are learning how to become creators themselves. They start by learning the basics: Engineer, Designer, Digital Creator, Hacker, Entrepreneur, or Wordsmith.