Work together with the kids to build a solar system model to give them some hands-on learning. Plan to make this solar system over a weekend, as you have to let paint dry on the planets before you continue with assembling the solar system. Put one ball on each paper plate so it is easier to keep track of the planets.
How to Build a Solar System Model for Kids. Paint the Styrofoam balls, taking care to completely cover the entire surface. Allow the paint to dry. Cut out a circle of card stock that fits around Saturn. Cut out a hole in the middle of the circle so you can wrap the rings around Saturn. Draw lines with markers to represent the rings. Glue the rings around Saturn.