N.W.
Peninsula Youth Theatre in Palo Alto (www.pytnet.org)--runs two-week all-day camps
Starting Arts (Silicon Valley area) runs, I think, a 4-week camp, 9-2 or 9-3 PM, www.startingarts.com
Villa Montalvo in Saratoga also runs a summer performing arts camp (I think their website is www.montalvo.org)--10AM to 4 PM. Wonderful program but kind of pricey and you have to buy tickets to see your child perform in the Friday evening show
Good Luck and have fun!
~N.~