The expanse of grass is large enough that it only gets crowded during a concert, or when thousands of Israeli revelers converge on the park en masses for the annual Independence Day grill fest. The trees on the edges of the grass provide sufficient shade for a sprawling picnic spread, while the un-shaded areas are large enough to support a game of ultimate Frisbee.
More activity-specific facilities include basketball courts, soccer pitches, tennis courts, a bike path (which extends for several kilometers beyond the park), a large children’s playground, an exercise park, and the Bird Observatory. It's also a short walking distance to the Israel Museum and Bible Lands Museum. Definitely a place to go in good weather.