C-Bot Crawler Bot This crawling critter (C-Bot Crawler Bot) isn’t a pest – it’s a fun kit that utilizes mechanics and water power to crawl across the floor or other flat surfaces. After it is built, just push the plunger back and forth to move the C-Bot forward. Great for demonstrating Newton’s third law of motion, basic hydraulics, and other concepts. Laser-cut parts glue together to create subassemblies, which are then screwed together. Requires white glue, cool-melt glue gun and glue, small screwdriver (all sold separately), and water.