I have 3 - 7 year olds in my house. There is a big difference between them an 9 year olds but for what it’s worth … my son loves to draw after watching cartoons. First he starts with characters from the movies but eventually he makes his own variations of robots, dragons, dogs and so on. I find that they also like to illustrate stories so you might encourage them to illustrate their own stories.
I tried to teach them shading and breaking down an object into shapes but it didn’t really ‘click’ fully at the time. I just went back to school about 4 weeks ago to study animation and they saw me doing the animated flour sacks and when I showed them how these turned into animation they spent the next two days drawing ‘frames’ of simple stuff all on their own. I decided to capitalize on their interest an picked up a simple ‘Learn to Draw Dinosaurs’ type book that showed how to draw them from basic geomtetric shapes and this time it caught - they spent a week fighting for the book but instead of the flounder/flattened style characters (both eyes on one side etc) they have begun using overlapping shapes and erasing lines and better understanding the concepts.
Hope some of these observations may be helpful.
Hmm… one more quick thought … maybe for a ‘pre-perspective’ training you can create the horizon lines etc and create simple perspective objects like cubes and make copies then invite them to use thier creativity to turn the row of cubes into houses etc -think of it like the first writing paper kids are given that indicates the height and midpoint of capitals and small letters when they are learning to write.







