Solar System Model in a Jar
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Looking for a fun, hands-on way to explore the solar system? This Solar System Model in a Jar is a creative space project kids will love making — and displaying afterward. It’s a perfect addition to any space unit or astronomy study.
Kids get to build their own mini solar system while learning about the planets, their colors, and their order from the sun. Plus, the finished jar looks like a floating space scene!
How to Make a Solar System Model in a Jar
Supplies Needed:
Air-Dry Clay
Fishing Line
Empty Jar
Hot Glue or Super Glue
Toothpicks
Step 1: Create the Planets
Shape the planets out of air-dry clay. Keep them small and lightweight so they can hang easily inside the jar.
You can look up reference images of the planets to match their colors and sizes as closely as you’d like — or just have fun with creative versions!
Step 2: Make Hanging Holes
Before the clay dries, poke a toothpick halfway into each planet to create a hole for hanging. Leave the toothpicks in place while the clay dries so the holes stay open.
Air-dry clay usually takes 24–48 hours to fully dry.
Step 3: Attach the Fishing Line
Remove the toothpicks. Add a small dab of glue into each hole and insert a piece of fishing line or thread. Let it dry completely.
Cut the lines at different lengths so the planets hang at varying heights inside the jar, giving the model a floating, layered look.
Step 4: Attach to the Lid
Glue the other end of each fishing line to the inside of the jar lid. Space the planets out so they don’t bump into each other.
Let the glue dry fully before moving on.
Step 5: Assemble Your Solar System
Carefully lower the planets into the jar and screw the lid on. Move slowly so the strings don’t tangle.
Now you have a floating solar system display!
What Kids Learn
This project is a great way to reinforce:
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Planet names and order
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Relative planet sizes
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Basic astronomy concepts
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Fine motor skills and spatial planning
It also gives kids a hands-on connection to space science, which makes learning much more memorable.
More Space & Solar System Activities
If your kids enjoyed this project, you might also like:
Printable Constellation Cards
Solar System Unit
Star Viewer Craft
Shooting Star Spinner
