summary - In the womb, Olivia and Hailey Scheinman formed to the thump of the same heartbeat. Cells divided and organs sprouted, skin and hair knitted together while fluids swirled. Their mother rocked them with her every step. For reasons no one knows, something didnat proceed normally for Olivia. During the first trimester, her brain didnat form the way it should, the way her twin sisteras did. For seven years, life has relentlessly pulled Hailey and Olivia apart a milestone by milestone. Hailey walked at 11 months, talked at 15 months, kicked her first soccer ball at 5. At 7, Olivia cannot stand and struggles to hold her head up. She smiles when sheas happy, but she cannot say it. For years, Oliviaas progress has been measured hour by hour, with each letter aSa her mother scribbles on calendars when she has a seizure. (June 8, 2012, Clearwater, Fla.) An afternoon snuggle break on the couch turns into a case of the giggles for Allison Scheinman and her seven-year-old twins Olivia, center, and Hailey. "There's always something to smile about with these two," said Allison, who believes having a daughter with disabilities has helped her and her husband Jon find hope and joy in the small things.