Collect different leaves and make leaf rubbings, noticing shape and vein patterns.
Leaves come in many shapes and sizes. Collect a few and make their picture with a crayon.
A leaf rubbing shows the lines inside the leaf, called veins.
Mastery looks like: They can make a recognizable leaf rubbing and point out the veins on the paper.
Common stumbles: Pressing the crayon point-down instead of sideways is a common first try; showing the sideways motion once usually fixes it.