Solar System Project Ideas For Kids, http://hative.com/solar-system-project-ideas-for-kids/,
This is an ecological pyramid. It has six parts that make up ecology. Many schools teach this because the 6 parts are important to know.
Earth Day 2013 is Mon., April 22. These Earth Day "Handprint Globes" glued on black construction paper, along with students' creative writing assignments would make a visually stunning Earth Day bulletin board display.