For this project what you need:
1) Foam balls (Different size for all the planets and the sun)
2) Black Foamboard
3) Acrylic paint
4) Hot glue
5) foam sheet
6) white chalk
At first, I colored all the foam balls for making planets and the sun with acrylic paint. And for Saturn ring, I used foam sheet and colored it with acrylic paint and glue it to the Saturn.
Now I cut the foam board (11x20 inch) 1 piece,
(3x11 inch) 2 pieces, (3x20 inch) 2 pieces.
Then join together as shown in the video and make it like box
Now paint with acrylic color using tissue paper so it will create a texture. Then take a toothbrush dip into white paint and sprinkle with your finger for more realistic look. Then using chalk draw the line of the orbit of the planets. And then stick all the Planets and the Sun using hot glue. Now your 3D Solar system is done.