Must find plans to make this! -- The reshaping wood pallet ideas with the storage option are the best because they help in avoiding the mess in a room, this idea is a combination as it serves as a couch on wheels as well as allows storing the items.
How to Make a Cinder Block Bench: 10 Amazing Ideas to Inspire You!
Inner ring MUST have a layer of large river stones for air +water to get to trunk, otherwise it will suffocate + kill the tree. The soil will support small shallow rooted plants like Allyssum or Primrose.