Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The playground in a dream indicates the world, its adornment, and its amusement. Playing in it indicates heedlessness of the Hereafter.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The playground indicates a market or a gathering place. Whoever sees himself play in it is disputing.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The playground is interpreted as worry. Whoever sees himself in it will be afflicted with worry.