A play mat is very helpful for motor development. Because it offers a lot of freedom of movement and your baby can turn and crawl to his heart's content. Of course, the little explorer survives the first attempts at crawling unscathed, because soft padding protects against pressure points. Finely woven cotton fabrics prevent small fluff from being swallowed.
By the way: The playmat can also be used as a changing mat and models like the Little Dutch playmat also cut a great figure as a playpen insert!