This FloraCraft Solar System Kit makes it easy for children and adults to work together, constructing a model of our solar system and learning scientific facts about the sun and planets in our solar system.
How to make a poster of the Solar Sytem -- complete tutorial for school projects. I did this with my niece for her school project, but we slightly changed a few things.
Easy hands on learning about the solar system! - Create a solar system of recycled plastic lid planets from Still Playing School
Good Ideas for Grade Solar System Projects (page
Solar System Project Ideas For Kids - Hative