Our strong advice is to invest in Litill Terrariums, small ecosystems made with hand blown glass from the Pacific Northwest. We saw them on litill.com and simply fall in love.
Each of it is an original hand made art piece and has unique elements. When you buy one, you will receive a pipette for watering the plants and a diagram telling you how often to care for the elements inside. Another important rule is to not place them near direct sunlight and not over-water. That's because too much watering could be worse for plants than too little. For more information, take a look on their website. Prices are from 125 $ to 500 $, depending their sizes.