World's most expensive terrariums

They're created by garden designer Paula Hayes.

The one above is made from Leucobryum, Mascarena, Salaginella with black sand, and dogwood sticks.

It's signed and numbered on the bottom by the artist, and costs $10,000.

The art world is now taking notice of Hayes' work, hence the added zeros to what was once a third-grade project.

Could this be "The Bonsai Strikes Back?"