Okay, I’m a huge fan of all the Knock Knock products (they make great stocking stuffers!), but the “Don’t Kill the Kids” one is my favorite. I’ve left this form for babysitters and they’ve all thought it was pretty darn funny...and helpful! From practicalities like emergency numbers and bedtimes to absolute no-no’s, Knock Knock takes concise, straight-forward directions to a new level of cool.
Paper Source at Santana Row has a nice selection, and so does the Art Store on Van Ness in San Francisco.