Update

Our adorable terrariums are...no longer with us. I think there a few things that might have gone wrong. 

1. The directions we used said you could add a layer of activated charcoal if you wanted. That should have been required. It's supposed to act as a water filter and keep things clean and a couple of ours with bigger plants got a moldy look to them.

2. I think you're supposed to mist them but I was lazy and just stuck them under the faucet every so often.

3. I took for granted that terrariums were "easy" to care for and expected them to do,their own thing. 

This picture was posed and is not an accurate depiction of emotion based on the loss of terrariums.