Terrarium Class at Garden in a Glass KCMO located in Mix It Up Custom Painting in Overland Park, KS, USA. Learn how to create your own mini ecosystem in a glass container with the guidance of our experienced instructors. This hands-on workshop is perfect for plant lovers of all levels. The $25 will include a large and attractive glass jar, our special terrarium soil, 2-3 plants, pretty hardscapes (rocks and wood), and instruction. You may purchase a larger or "fancier" glass jar, geodes, crystals, and vintage figurines for your terrium at an extra cost if you wish when you are there, but it is not necessary!