Easy, pretty and cool: Terrariums are back in style

This terrarium was created at Plant Nite at a bar in downtown Boston on Nov. 18, 2017. (Photos by Tracee Herbaugh/via AP)

Plant Nite participants build their own terrariums at a bar in downtown Boston, with supplies such as paint brushes, succulents, containers and potting soil.

This terrarium was created by a Plant Nite participant.

People learn the craft of terrarium building at a crowded hip-hop bar in downtown Boston during Plant Nite, Nov. 18, 2017. (Photos by Tracee Herbaugh/via AP)

Diandra Escamilla, left, and Swetha Ramachandran hold terrariums they created at Plant Nite at a bar in downtown Boston.

BOSTON — At a crowded, downtown bar one recent Saturday night, the lights were dim, hip-hop music played and most everyone had a drink in hand.