A couple of weeks ago my mom and I attending a class at the local library on creating terrarium planters. A local gardening expert taught the class and brought many examples of terrariums that she created, along with all the supplies for us to make our own, except the jar. I chose to bring a lidded jar, an old-style mason jar I purchased at HomeGoods for under $4.
We layered charcoal, gravel/rocks, and soil in our jars before adding some plants. The plants we used were mostly small rootings from larger plants and even some succulents (for open containers only.) I used three small plants, one variegated, one with tiny green leaves, and a purple leafed plant. (I can't recall the names anymore.) I really liked how my terrarium turned out. We used moss to top the soil once the plants were in place.
Sadly, two weeks later, I discovered that two of the three plants had rotted. I apparently watered the jar too much and kept the lid closed too long. So, I need to start over! I'll have to spend some time at Lowe's or Home Depot to find one or two replacement plants. I'm also thinking maybe it would be fun to do an open dish terrarium with some small succulents. I've seen some great varieties available on etsy, so if the local stores don't have any, I'll order a few online.