Great Grandpa Hike - Easy walk to some of the best tide pools on the coast.
Take the grandchildren on an outing they will remember. Take lunch and make it a day. Make sure you check to see when the tide is out for maximum viewing (a great learning moment to talk about the tides and the moon) Make sure you take a pair of old shoes to walk in the tide pools with.
Make sure you take a moment on the way to or from the pools to look at the Light House and the view of San Diego.

Definately as awesome sight to see the pacific Ocean Waves Crash into the cliffs you are standing on and to see the strange formations time has carved into the hillside.