What is more fun and engaging than our indoor-outdoor Gus Climb-N-Crawl Caterpillar? Why our 4-Section Gus Climb-N-Crawl Caterpillar Extension! The Gus Extension is a fun way to really get the most out of your investment, as it doubles the length of the “climb-n-crawler.” It also doubles the fun by adding many new play possibilities. Fun adventures await all your new crawlers, toddlers, and children! This safe and tough unit is built to last and comes complete with a two-year limited warranty.