Cardboard boxes are the packaging material of choice for the majority of products shipped around the world. In fact, because of its popularity, cardboard boxes comprise a whopping 9 percent of the refuse in a typical landfill. But your old cardboard doesn’t lose its usefulness once the snacks are gone and packages have been opened. Because, aside from simply recycling old cardboard, you can use the material in dozens of creative and practical ways.

Where some people see it as extra storage, some cats see it as a perfect home; Japanese artist Monomi Ohno, however, sees it as a building material for her amazing 3-D sculptures.

During Monomi’s studies at the Osaka University of the Arts, she chose to specialize in 3D animation. Unfortunately, the necessary software for the 3D animating costs an arm and a leg. So instead of spending all that money, she decided to use a stash of empty Amazon boxes laying around to hone her skills instead.