If you ask kids to draw a flower most will draw a cartoon-y flower pretty confidently. Use these directed drawing tips as well as the free video tutorial (scroll to the bottom) to take a flower drawings from simple to colorful, complex drawings that will teach your kids that every drawing is made up of simple shapes and lines.
I’m all for free form, creative process art. In fact most of my lessons are very open ended. But I also believe it’s good for kids to learn some basic tools or skills that they can then use in their own art in their own way. This pine tree tutorial includes a few simple directed drawing steps plus the fun addition of color using the super simple (and not messy) paint with markers technique.