Fly a kite, there is plenty of space, and usually a fine breeze blowing.
Search for chalk downland wildflowers, including Common spotted orchid, Bee orchid and Yellow rattle. Yellow rattle is crucial to this rare habitat; it is semi-parasitic on grass, so prevents the grasses from dominating and smothering wild flowers and herbs.
Hunt for butterflies in summer, including the Marbled white, Dark green fritillary, Adonis blue, Chalkhill blue and Green hairstreak. The blue butterflies have remarkably close relationships with the downland ants; as caterpillars, they sing to the ants and live underground in ant hills (these ant hills are visible as small bumps on the older patches of downland).