Carpets can be dust and allergy holders Though a carpet can be a perfect floor for a baby to crawl about, it can also be a favorite place for dust mites, pollutants and allergens. Even pesticides and chemicals are found in carpets. Imagine your child playing in such surroundings. Even if it is a new carpet, it has volatile chemicals in it, which are released into the air. Inhaling this air can be pretty dangerous for adults even, so you can imagine what harmful effect it would have on a baby. A wool carpet will be the best option for newborn babies to crawl on.