Marcia Cross introduces her two new bundles of joy – fraternal twins Eden and Savannah, who were born on Feb. 20. Since their birth, the Desperate Housewives star is getting used to a new routine. "I feed, I burp, I change diapers, I pump," Cross tells PEOPLE in its new issue, on newsstands Friday. Plus, she's getting to know her girls: "Savannah kicked all the time, and Eden was really quiet," says Cross. "Now Eden's the feisty one and Savannah's a little more Zen."