Gather your supplies. You'll need:
succulents
a glass container
Soil
Something whimsical to decorate it with (optional)

Put some soil into the bottom of your container. I used some large candle holders to contain my succulents.

Add the succulents. I got mine at Home Depot. They have a nice variety of succulents and the lowest prices I've found.
Don't over crowd your terrarium as your succulents will need space to grow. You probably won't need as many succulents as you think.

Optional:
Add something whimsical to your terrarium such as a small toy animal. I made these little kitties with super long legs to stick in the dirt out of polymer clay.

Enjoy your succulent terrarium!
Water once a week or as needed. Succulents are super easy to care for!