Long time ago, when I started my life as an instructional designer, I created several training packages using a slide projector and a reel-to-reel audio player. You cannot find these pieces of ancient equipment anymore. But you have a wonderfully easy technique on the Internet for producing audiovisual training packages.
Check out my video training package on how to make a magic square. You will learn an interesting skill to amuse yourself and amaze your friends.
Have fun. Learn an intriguing procedure. Explore an effective approach for creating training packages.