If you want to learn the simplest ways of creating beautifully and intensely colourful drawings, consider using chalks and pastels.
Chalk Pastel & Tempera Paint Portraits for Kinders
Introduction to Pastel Drawing — Online Art Lessons
Soft Pastel for Beginners: How to Draw with Soft Pastel
An Introduction To Drawing With Chalk And Pastels
Three Ways to Use Chalk Pastels
Pastel, Techniques, History & Uses
Drawing: Pastels, Chalk, Coloured Pencils - Art and Picture Books - LibGuides at University of Lethbridge
How to use Chalk Pastels in the Artroom
Pastels: Everything You Need to Know Before Buying Soft, Hard, Oil or Pastel Pencils — Art is Fun
An Introduction to Drawing Animal Fur for Beginner Soft Pastel Artists – Shaymus Art
An Introduction To Drawing With Chalk And Pastels