In the Northern Suburbs, I recommend Sir James McCusker Playground in Iluka, Burn Beach Playground, and Tom Simpson Park in Mullalloo. These are the three places I take my children to, and they love them all as each playground area offers different experience. Tom SImpson Park has a huge grassy area to run around, Burn Beach Playground is just across a small cafe where my kids get a treat of ice cream , and St.James McCusker Park has barbeque are and nice duck ponds.