Newtown school Superintendent Janet Robinson said the school has been transformed into a "cheerful" place for the students. She said mental health counselors continue to be available for anyone who needs them.
Caron, 32, said her son knows what happened and has undergone counseling. She said her 5-year-old daughter, Paige, attends afternoon kindergarten at the school and has been dealing with nightmares about "snakes and bears and coyotes."
"She wasn't at school that day but was with me when we went to look for William at the firehouse," Caron said. "Unfortunately, she heard more about it than I wish she did."
Intellectually, Caron said, she knows her children will be very safe at their new school.
"But, emotionally," she said. "It's very hard to turn off the little 'What if?' that kind of hangs on and says, 'Well, you know what, December 14th started out as a normal day, too."
Associated Press writer Michael Melia contributed to this report from Hartford, Conn.