Playpens are used to provide a safe area for a baby to play in. They do not allow access for animals or other toddlers which potentially could accidentally hurt baby. In addition a playpen stops a baby crawling somewhere dangerous when you are not looking and enable you to get on with household chores or other acitivites that need to be done. Playpens come in different colours and styles. Most playpens have 4 sides with boards or slats. Others have a door for easy access but tend to cost a little more.