Although it’s impossible to give an exact age when babies can start playing on playgrounds, generally speaking, babies begin to sit up and crawl around between the ages of five and seven months. From this point on its great to start introducing them to various toys and play areas; providing environments for them to develop and play independently.
Keep in mind that if you introduce babies to playgrounds before they have developed the ability to crawl and move on their own, they can easily become frustrated and agitated; stimulated by the sights and toys around them but still not able to explore the environment around them.
Some babies even have the potential of becoming overwhelmed, overstimulated and may feel a little lost; invoking sensations of fear and insecurity. Make sure you watch the baby’s behavior well and critically analyze their different developmental stages to consciously decide whether or not they are ready to be introduced to playgrounds.