December is the month for cozy sweaters, soft lights, and hands-on learning done in the warm rhythm of home. This year, invite your family into winter-themed STEAM adventures, each one built to feel restful, creative, and deeply engaging. Below are ten project ideas sure to create a December full of wonder.

1. Pine Cone Science & Winter Tree Investigation

Grab pine cones (or small evergreen branches) and experiment with how they open/close, how trees change in winter, and what that means for the environment.

Link: Pine Tree Science Activities for Kids

This is perfect for a hygge-afternoon: examine, sketch, compare, and talk about how winter shapes nature.

2. Festive Christmas STEM Building & Design Challenge

Let students design and build a sleigh, chimney, snowball launcher or winter-themed structure using recycled materials.

Link: 31+ Festive Christmas STEM Activities for Kids

Use this as a framework to explore design, material strength, force and fun in a winter context.

3. Edible Stained-Glass & Candy Crystal Winter Science

Explore how sugar and heat combine to form crystals or transparent candy shapes: a wintery twist on chemistry.

Link: 31+ Festive Christmas STEM Activities for Kids

Find the “edible stained glass” idea in the list. It’s delightfully cozy and scientific.

4. Hot-Chocolate Heat Transfer Experiment

Measure how quickly hot cocoa cools in different containers (metal, ceramic, paper) and discuss insulation, conduction, and why our mugs feel warm.

Link: 31+ Festive Christmas STEM Activities for Kids

A great way to bring science into a quiet winter afternoon.

5. Snowball Catapult Design

Launch marshmallows or pom-pom “snowballs” using small catapults and talk about force, energy, angle, and motion.

Link: 31+ Festive Christmas STEM Activities for Kids

Encourage experimentation: change the angle, adjust materials, measure outcomes.

6. Blizzard in a Jar – Winter Weather Science

Create a “blizzard in a jar” experiment and explain how snow forms, settles, and dissipates.

Link: 31+ Festive Christmas STEM Activities for Kids

A mesmerizing, cozy way to learn about weather right inside your home.

7. Static Electricity Winter Fun

Use balloons, shaving cream or small lightweight objects to explore static electricity — this one brings a little wintry magic indoors.

Link: Static Electricity Science Experiment for Kids

Although not explicitly winter-themed on the site, it’s easy to add a “snowflake chase” or “winter wizard” context.

8. Holiday Coding & Sequencing Game

Have students map a winter journey (from cabin to snowman to sledding hill) using arrows or symbols — then turn it into a “code” they execute.

Link: 24 Groundhog Day Activities for Kids in the Classroom 

While this is Groundhog-Day themed, the coding section features light and shadow tasks that work beautifully for winter.

9. Pine Tree Life-Cycle & Winter Adaptations

Explore how evergreen trees survive winter, how pine cones open/close, and why certain trees are chosen as holiday symbols.

Link: Pine Tree Science Activities for Kids 

A restful, reflective project for a winter afternoon.

10. Holiday STEM Challenge Bundle (Design & Build)

Choose from a selection of holiday/ winter STEM challenges like building a sleigh, bridge, or snowball launcher. Use everyday materials, test designs, iterate, and reflect.

Link: 31+ Festive Christmas STEM Activities for Kids 

Final Thoughts

December offers a wonderful opportunity for hands-on learning that feels like rest, warmth, and discovery. These ten projects tie into existing resources at Hess UnAcademy, making it simple to plan. Each activity invites creativity, experimentation, and cozy discovery, perfect for a winter homeschooling rhythm.