Some playpens are designed explicitly for crawling. It means that baby can quickly move around inside the playpen and explore its different areas. Crawling is an excellent way for babies to develop their motor skills and learn how to navigate their surroundings. Some playpens also have features that make them helpful for older babies starting to learn to walk. For example, some best playpen for crawling have sturdy bars that help babies independently climb up and explore the playpen. They also have wide entrances that make it easy for babies to get in and out of the playpen.