On the 'Mornington Peninsula side' you can find the greater opportunity to really stretch out and enjoy use of the beach without worrying about dinging someone in the head with a frisbee or a rogue soccer ball bowling over someone's sunscreen bottle.
The water itself is also a big draw. Shallow for many metres upon entering across much of its shore, it's the sort of beach kids can enter and play in the shallows safely without worrying about a sudden drop of depth.
Beyond this though, Carrum also features a sandbar that breaks up the crest of an incoming wave and spills over into a shallow pool. This is a great little spot for younger swimmers and new combers to wade around in, and also helps prevent swimmers from getting an unwelcome surprise of a big wave on their back as they look to return to the sand.