You pick the glass vessel and included is the build, the moss, rocks and one single terrarium plant. Options are all customizable. Add additional plants to your terrarium for 5.99$ per single terrarium plant. Mini Terrariums start around 19.99$ and go up. Larger Terrariums start around 49.99$ and go up. All builds are included in glass purchase price. If you already have a glass vessel at home or have been saving, bring it in and only pay for the build and your plants!