Kids climbing the walls at your house? Let 'em vent their energy more appropriately at the Emeryville Public Market's ball pit, a free and rockin' good-time rainy-day activity for people under 48 inches. Not only can the kids jump, swoop, and dive into hundreds of multicolored balls until the sweat drips from their faces, the whole family can grab a bite to eat afterward from one of 25 food booths, with cuisine ranging from Philly cheesesteaks to Vietnamese soup. Let's face it: For budget-minded parents, it just doesn't get better than this. But make sure the little ones wash their hands before eating. "Sanitary" is not a word that comes to mind given all the toddlers who use the play facilities.