Yes, that is a proper pluralization of terrarium. (I looked it up.) Terraria works, too, but seems a bit pretentious. Okay, enough with the grammar lesson and on to the subject matter.
The boys made terrariums today with Bruce. They were quick about it; the whole thing happened while I was out on a walk. Here’s Ezra’s.
He’s got a little Star Wars thing going on in there, and there’s a hidden blue lizard as well.
Finn didn’t want to do one initially, but then he saw this vessel and changed his mind.
He went with a Minecraft figure, a couple of dinosaurs, and one very well-hidden ninja.
Definitely not your grandmother’s terrariums.