3 crayons will be enough for today's vehicle.
First draw a big square.
Draw a rectangle inside the square, towards the top.
Draw a filled in rectangle between your rectangle and the square.
Draw a big rectangle to the right of the big square.
Connect the square and rectangle with a tiny filled in square, at the bottom.
Draw 3 circles: one under the square, and 2 under the rectangle.
Draw even smaller circles inside your previous circles.
Add a cool logo to the side of your truck.
Fill in your tires.
Fill in the front of you truck.
Color in your logo.
Lightly fill in the rectangle in the back.
Your truck is complete! 🎉