Mix the desert sand and powdered tempera paint in bowls. Add a small amount of water to each bowl, and stir it with a plastic spoon. Allow the sand to dry completely.
Show students samples of desert sand art and describe the shapes and pictures that were used in the painting. Have them interpret what the artwork may mean. This will help the fourth graders get some design ideas.
Instruct the students to draw sample designs on paper. They can use these samples to plan what colors to use. Remind them to keep their artwork simple because too many colors can distract from the focal point. Once they have completed their samples, the students can then copy their designs onto heavy manila paper.
Water down the glue to make it thinner. Have each student apply the glue to their designs using a small craft brush. Explain to them that they can only apply one color of sand at a time. If they apply a new color too quickly, it will combine with the previous color.
Scoop the sand with a plastic spoon and sprinkle it on the paper. Tap the edge of the paper on the table to remove excess sand. After the first color has dried, apply the second color of sand. Repeat the process until the designs are finished.
Direct the students to discuss their artwork with each other. Prompt them to discuss what they like about other pictures and have them explain why they chose their designs. This will help reinforce the lesson and build their social skills.