Lady Farrah on etsy is offering a Make Your Own Moss Terrarium Kit which includes:
Approximately 25 square inches (5” x 5”) of Luscious Live Moss
Terrarium Building Instructions
Terrarium Easy Care Instructions
A Terrarium Monogram Letter of Your Choice
The only thing you need to bring to the table is a glass container. You can use something you have around the house or you can go out and buy a fancy apothecary jars.
For more, read about how to grow a garden in a jar.