This is the Sparc: a wall climbing origami robot by researchers at the University of Michigan and Shanghai Jiao Tong University that can crawl on a flat path and climb up vertical surfaces. It uses 3 pneumatic actuator based on Kresling origami patterns. These are like accordion folding under vacuum pressure. The below video shows it in action:
This robot weighs about 0.5 lbs. It uses silicone suction cups with a dual cup design per foot to climb. You can find out more here.