Officers are investigating the considerable amount of damage and would appeal for any witnesses to come forward.
The incident took place overnight on Monday 28th December into Tuesday 29th December at Jade Green Park in Grangetown.
Anyone with information regarding those responsible is asked to contact Eston Neighbourhood Policing Team on the non-emergency number 101, quoting incident number 210400.
Independent charity Crimestoppers can be contacted anonymously on 0800 555 111, or online at www.crimestoppers-uk.org.
