You can make a solar system model out of many types of materials. The one thing you should keep in mind is scale as the planets are all different in size.
How to Make Solar System Models From Construction Paper
Giant Solar System Model
Solar System Model Child Science And Technology Learning Solar System Planet Teaching Assembly Coloring DIY Toys - AliExpress
Make a Model of the Solar System
Model of the Sun-Earth-Moon System.
Rocket Launch/Create a 3D Solar system competition - Space Week
How to Make a Model of the Solar System – Scout Life magazine
Build a Scale Model of the Solar System — Hatching Curiosity
How To Make A Solar System Model At Home – SNC
How to Make a Rotating Solar System Project for School Solar system projects, Solar system projects for kids, Solar system crafts
31 Galactic Solar System Projects for Kids
Solar System Planetarium Model
How To Make A Solar System Model At Home – SNC