Playpens are usually used when babies are 4 months old. This is because during this period, the baby's salivary glands begin to mature, resulting in increased drooling. Bibs can help absorb saliva. However, most babies start learning to crawl when they are 5 to 7 months old. At this time, parents usually buy crawling mats and playpens to protect the baby from injury while crawling. Bed guardrails can be used from when your baby is five or six months old to over two years old. Some babies can turn over or even crawl when they are thre...
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