Some pediatricians may give out stickers, crayons or small toys to their young patients after a routine wellness visit. But others like Dr. Trude Haecker and her colleagues at Children’s Hospital of Philadelphia have been taking a different approach: They’re “prescribing” new books to children and families. The practice of “prescribing” books is part of a national model called Reach Out and Read, which originated in Boston in 1989. Reach Out and Read has now launched a Pennsylvania affiliate to expand the program to more parts of the commonwealth. More than 1,000 pediatricians statewide participate in the initiative, said Haecker, who serves as medical director of CHOP’s local book program.