One Week Sarah's Science 'This Land is Your Land' Summer Day Camp. Camp held in Oakland at Roberts Regional Park or in Berkeley at Tilden Park. Your child will discover just how fun learning can be! Winner of the item is entitled to attend Sara's Science "This Land is Your Land" award-winning summer day camp for one week in summer 2010. Weekly sessions start June 21 and go through to the week of September 3. Activities include swimming, games, nature hikes, arts & crafts, and of course, lots of fun science! Check out our web site to choose the themes that will inspire your whole family!