It has the sophistication of luxury furniture with the playfulness of childhood. App One Design, an Italian design firm, developed a set of interlocking LEGO-like bricks of marble. They can be arranged and re-arranged however you wish and matched with glass tops with precision-cut holes for the studs on the bricks. Although you are unlikely to accidentally step on one barefoot, stubbed toes are now a hazard. You can see more photos at Home Crux.