WASHINGTON, (AP) -- Malia and Sasha Obama learned a few tricks from Barbara and Jenna Bush on their recent visit to the White House — like how to slide down the solarium ramp, bottom first. The daughters of President George W. Bush showed the girls their bedrooms, helped them jump on a bed and taught them a few ways to have fun, Laura Bush told ABC's "Good Morning America" on Wednesday. "It was fun for the girls to get to show them not only (their rooms), but the way the big cross hall can be an obstacle course for little...