ferns Terrarium idea for insects

This tall, well vented terrarium is designed for keeping insects as well, like praying mantis.

this is the finished project:

Building tutorial:

I am using cooking foil to hold water, so I can reduce watering frequency and the moss and fern can grow better.

plants:

The fern: maiden hair fern, and bonston fern.

moss collected from my flower pot.

top dressing rocks: small black lava, 1-3mm and red lava rocks 5-7cm.

its recent status, with a praying mantis living inside.