Add a light horizon line on the black paper. It can be straight or slightly wavy.
Place green, yellow and white tempera paint on a paint tray or palette. Dab textures for the grass after picking up two colors at a time on the brush.
FIll the whole space under the horizon line.
Painting the Sky
Start with separate blobs of violet, blue and white on a paint tray. Dip your brush into different colors and swirl in the sky. You can leave some black or really fill the sky with paint.
Let painting dry.
Adding Trees
Draw three tree trunks with brown oil pastel or paint with brown paint.
Add leaves with red, oragne and yellow tissue paper. Wrap tissue paper around pencil end, dip in glue and stick on project.
Use dark colored chalk pastels to add shadows in the texture landscape.
Notes
Do not use water to clean your brush. You will not get the same texture feel and kids will end up with watered-down colors.
Make sure not to mix colors on the paint tray. Children need to understand that if they do that, they will not get the variety of colors and tints.