Winter Activities for Kids: How to Make a Terrarium

We’ve had a deluge of rain lately, and this weather gifted us with beautiful moss in our garden. I decided to show the grandkids how to make a tiny terrarium to utilize this unexpected bounty!

Terrariums, uncovered. It  shows the moss, plants, and animals used to make a terrarium.
Our tiny terrariums, uncovered.

I realize you might live in area that’s blanketed with snow. No moss.

So, below, I’ve put together resource links of winter gardening activities you can still do with kids of all ages.

How I Found my Terrarium Containers

The challenge of being a grandmother of two, instead of an elementary school teacher, is that you end up purchasing more than you need. For example, when I wanted magnets so the kids could make photo refrigerator magnets for Mother’s Day, I had to buy 24.

More indoor fun: make fish, then try our go fishing game!

The same was true for the clear plastic bath bomb molds in two sizes we used to make photo Christmas ornaments. I have more than a dozen molds left. One of them was still sitting on my desk, looking like a mini terrarium, so I thought, why not?

The terrariums, closed and on toilet roll stands covered in washi paper.
The terrariums, closed, sit on stands made from toilet paper roll strips.

If you don’t want to purchase these molds use a small, squat glass jar with lid — maybe something jam or mustard came in. Or buy the molds and make the ornaments with the remainder before Christmas. They’re really cute! And they’re lovely keepsakes.

How to Make a Tiny Terrarium

“Tiny” is key. Tiny terrariums are almost foolproof. They take few materials and the don’t need much looking after. Their little ecosystem is easier to control.

Child digs moss using a spoon. The moss will be the base for her terrarium.
Miss T uses a plastic spoon to dig up moss; she’ll lay it on her paper towel to bring indoors.

Materials

  • small clear container such as clear bath bomb shells * or small jar with lid
  • gravel
  • potting soil
  • moss
  • small plants
  • small plastic animals

*My bath bomb shells were 3 inches in diameter for the large, and 2 1/4 inches in diameter for the small.

Equipment

  • plastic spoon
  • bamboo skewer

How to Make It

Kids dig moss out with a spoon to make tiny terrariums.
N digs up moss with a spoon, with guidance from Miss T

Go outdoors to collect the moss. Using a spoon, gently pry moss from the ground, keeping roots intact. Lay on a paper towel. Look for small plants or grasses and uproot them carefully with your fingers. Lay on your paper towel and bring indoors.

Pour gravel into your terrarium container to about 1/2-inch deep. The gravel will provide drainage. Spoon soil over the gravel to about 1-inch deep. (I transferred soil from a big bag into a plastic takeout sauce cup so it would be easier for the kids to work.)

How to make a terrarium: start with a layer of gravel, followed by a layer of dirt.
Gravel fills the bottom of the container; soil is spooned over next.

Now, lay the moss gently over the soil in small chunks, inserting the plants between the moss chunks, as you work. Pat moss and plants in place gently with your fingers. Use the skewer to jiggle the plants and moss in place to your liking.

N adds animals to his terrarium.

Next, add tiny animals. Finally, dribble a tiny bit of water over all using your spoon or spray lightly with water, and close the terrarium.

The terrarium will mist up during the day and water will condense on the cover. Take off the lid occasionally and let it sit exposed to air about 15 minutes to dry out some of the extra moisture, then close terrarium again. I haven’t had to water the terrariums since we made them. If the plants start to droop or if the moss appears a little dry, water sparingly and keep the terrarium covered to equalize the moisture.

How to Make a Stand

If you use bath bomb molds for your tiny terrarium, make a stand to keep them from rolling about. Cut a toilet paper roll lengthwise. Then cut the roll in 1-inch strips. Tape the ring back together with clear adhesive tape and cover the stand with washi tape.

For the larger-size terrarium, tape the ring back together, but instead of closing the ring, open up more space between the two cut ends of the toilet paper strip and bridge the open space with the clear adhesive tape. Cover with washi tape.

To make a stand for a terrarium, make a collar from toilet paper roll strips and cover with washi tape.
Make a stand for your terrarium with toilet paper roll strips and washi tape.

Additional Terrarium Instructions

Here are two blog posts for more information about making terrariums.

Winter Gardening Activities for all Ages

If it’s too cold for moss to grow where you live, here are some interesting and fun activities to do with the grandkids, no matter the weather, no matter the age, to keep them engaged.

If you live in snow country, instead of a terrarium, root vegetable scraps in water as a winter project for kids.
Kids will be fascinated to see vegetables take root in water and thrive in pots in the kitchen.

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