There is something incredibly rewarding about turning simple everyday ingredients into beautiful handmade ornaments. The first time my children and I created Baking Soda Galaxy Ornaments, the process felt magical. They mixed the dough, shaped tiny planets with their hands, and painted swirling galaxies once the ornaments dried. The finished pieces looked like miniature universes, each one unique. This activity combines creativity, science, and hands-on fun, making it a perfect craft for families, classrooms, or anyone who enjoys DIY projects.
What Are Baking Soda Galaxy Ornaments?
Baking Soda Galaxy Ornaments are small, hand-shaped decorations made from a baking soda and cornstarch dough. Once dry, they become firm and lightweight, ready to be painted with cosmic colors. When finished with a glossy varnish, they look like shimmering, handmade planets. Unlike plastic balls, these ornaments have a natural, slightly textured surface that gives them a charming DIY look.
Why Make This Activity
Encourages Creativity and Hands-On Expression
Children shape the dough, pick their colors, swirl paint, and add details. Every ornament becomes a small work of art. This process helps develop fine motor skills, visual creativity, and confidence.
Introduces Simple Science Concepts
Heating the mixture turns it from a liquid into a moldable dough. As it cools and dries, it becomes solid. Kids can observe how ingredients react to heat, how moisture evaporates, and how paint layers blend. It’s a gentle introduction to chemistry without feeling like a lesson.
Great for Holidays, Learning Themes, or Rainy Days
These ornaments work for Christmas, space-themed lessons, birthday parties, and calm indoor afternoons. With only three main ingredients, it’s an accessible activity for parents and teachers.
Ingredients and Tools
Ingredients
✔ 1 cup baking soda
✔ ½ cup cornstarch
✔ ¾ cup water
(These proportions are accurate, safe, and guarantee a perfect dough texture.)
Tools
A saucepan
A wooden spoon or spatula
A bowl
Parchment paper
Your hands to shape the dough
A straw for making holes
Acrylic paints (black, blue, purple, pink, white, gold, silver)
Paintbrushes
Clear gloss varnish or Mod Podge Gloss
Ribbon or string
How to Make the Dough
Heat the Ingredients
Add the baking soda, cornstarch, and water to a saucepan. Stir until the mixture is smooth. Heat over medium heat, stirring continuously. After a few minutes, the liquid thickens and becomes a soft dough, similar to mashed potatoes at first, then firming into a clay-like consistency.
When it pulls away from the pan and forms a lump, remove it from the heat.
Cool and Knead
Place the dough into a bowl and let it cool for about 10–15 minutes.
Once cool enough to handle, knead it until smooth. The dough should feel soft, not sticky, not crumbly.
If sticky → add a little cornstarch
If dry → add a few drops of water
This step makes the dough perfectly workable.
Shape the Ornaments
Take small pieces of dough and roll them into spheres with your hands. These become your planets. They will be slightly textured, not perfectly smooth, this is normal and gives a natural handmade look.
Press a straw into the top of each sphere to create a hanging hole.
Place all ornaments on parchment paper.
Dry the Ornaments
Let them air-dry for 24 to 48 hours. Flip them halfway so both sides dry evenly.
If you prefer to speed up the process, bake them at 80°C (175°F) for about 45–60 minutes. This temperature is safe and will not burn or crack the dough if watched carefully.
Once dry, the ornaments become firm, light, and ready for painting.
Paint the Galaxy Effect
Start with a dark base coat, black or navy blue. This gives depth.
After the base dries, use galaxy shades:
Blue
Purple
Pink
White
Gold
Silver
Dab the colors lightly and blend to create nebula-like swirls.
To make stars, dip a toothbrush in white paint and gently flick the bristles.
Metallic details add sparkle and bring the galaxy to life.
This process is simple, kid-friendly, and always produces beautiful results.
Seal and Add Shine
Once the paint is fully dry, brush on a layer of clear gloss varnish or Mod Podge Gloss.
This sealer:
✔ brings out the colors
✔ gives a shiny planet-like finish
✔ protects the paint
✔ strengthens the ornament
The gloss is what transforms the baking-soda texture into a polished, display-ready decoration.
Attach Ribbons and Display
Thread ribbon or string through the hole you made earlier.
The ornaments are now ready to hang on a Christmas tree, on a bedroom wall, or as part of a galaxy mobile.
Children feel incredibly proud seeing their creations displayed.
Tips for Success
Use dark base colors for a strong galaxy effect.
Let each paint layer dry before adding another.
If cracks appear, lightly sand and repaint.
Keep ornaments away from humidity; moisture can soften baking soda dough.
Store in a dry cardboard box after the holidays.
Creative Variations
Make glow-in-the-dark planets using special acrylics.
Use pastel galaxy colors for a dreamy look.
Create constellation patterns with tiny white dots.
Add glitter to the varnish for extra shine.
Shape the dough into stars or moons instead of spheres.
Frequently Asked Questions
How long do they last?
If fully dried and sealed, they can last several years.
Can children make them safely?
Yes. Adults handle the heating step, while kids shape and paint.
Can leftover dough be stored?
Yes, for up to two days in an airtight bag in the refrigerator. Knead with a drop of water before reusing.
Can I make perfect spheres?
Hand-rolled spheres are slightly textured. For perfect balls, use silicone molds.
Conclusion
Baking Soda Galaxy Ornaments are a beautiful blend of creativity, science, and imagination. With only three ingredients and a bit of paint, you can create tiny shimmering worlds that feel magical and personal. This DIY is accessible, safe, and filled with opportunities for children to explore colors, textures, and artistic expression. Whether for the holidays, school, or creative playtime, these ornaments bring wonder and joy into any space .
