"Being big doesn't mean losing small" is reassurance to their growing world. It gently affirms that even as they stretch into new roles, like becoming a big sister, they don't have to let go of the small joys, needs, and identities that make them who they are. Change is unavoidable, how we react to it is not. We can help shape reactions with love, and reassurance, making a smooth transition into "Big Sis Mode".