A little robot that would patrol a beach picking up small plastic bits 5mm - 15mm in size would be amazing. There is so much of that crap on our beaches. It&#x27;s crazy. Also making a robot move on sand, rocks, pebbles, keep out of the way of people and dogs. Navigate sand and rivers and the tide. It&#x27;s hard for people to do, we see people fall over, or get wet feet from a big wave washing up the beach or get cut off by the tide quite often.