Doorstep can be quite a formidable obstacle for a small robot. It can be too tall to drive over and too wide to step over. Luckily naminukas has few more cards in its sleeve. Having 2 degrees of freedom in each feet and pneumatic suction cups, it can act as a 4DOF pick & place arm! And not just any arm - an arm which can pick and place with both ends. See how naminukas acting as an arm builds a bridge to cross to the other side of the doorstep: