Lillian Rosenberg will celebrate her 90th birthday today with her children. She was born on the family farm north of Republican City, Neb. Her children are Rex of Hoisington, Douglas of Wichita, Neil (Carolyn) Fraser of Colorado, Mark (Debra) and Joyce VanCamp, both of Great Bend, Kay (David) Cook of Owasso, Okla., and the late Barbara Casey.