For the past several years I have created simple, what Pinterest calls, Yard Art. Not much of a welder, but I manage, and with a small plasma cutter, I have expanded my horizon. I don't sell the pieces, I make them for relatives and friends and give them away.
This, as I call it, Petrocube is a 2'x2'x2' 16 gage metal cube that swivels on it's base. All 6 sides are either etched or cut with petroglyph designs inspired from petroglyphs from throughout the world.