In St. Petersburg - close to Ft. DeSoto ... shopping at St. Johns Pass Boardwalk, Eating & Drinking at Sculleys / Rusty Anchor  (great band), and Bird Watching along the boardwalk.

Parasailing

in St. Petersburg

Visit Egmont Key - with one of the oldest Lighthouses in the Country.  Underwater ruins where you can snorkel.  Shelling and picnicking.

Kite flying

Playing Ball

Laying in the sun

Going to the Beach

Check out the Skyway Bridge

Or just watching everything.