Although there are many ways to build and style a terrarium here is a quick and simple guide to get you on your way. You can have an open terrarium or a closed terrarium.
Things you need
1) Terrarium - wash it thoroughly to prevent bacteria .
2) Stones- they can assist with water drainage.
3) Activated charcoal- optional
4) Moss- optional
5) Potting soil
6) Plants-Succulents,cactus,leaves etc
7) Decorations, pebbles,ornaments,coloured sand etc
8) Gardening tools,brush and spray bottle.