It's It was invented at Playland at the Beach, a long-gone Ocean Beach amusement park here in SF that was replaced by a dreary condo development. I see It's It in every grocery store in multiple packs. What good is just one if you love 'em? Laughing Sal, an automaton (correct term?) that greeted Playland visitors with a maniacal laugh, has recently been bought by the Santa Cruz Boardwalk.
The problem for me is the oatmeal cookies they use include raisins and clove. No, thank you.
They will still be here the next time you visit. After all, once you've been here, how long can you stay away from the city where "little cable cars climb halfway to the stars"?