I find this normal also. Young children do have a hard time apologizing and break down afterwards but it changing as they age a few years and they accept this is responsible behavior.
I have held DD many a times after I made her apologize because she totally broke down when she was 3, even 4 but now she gets it at 6. I remember she was around 4 when she made a comment to a little boy she knew, who has one arm, about how he couldn't do something because of one arm. I explained why she hurt his feelings and she had to apologize. I almost had to drag her back to do it and it was really hard for her but she did it, then totally broke down but it was the right thing to do and today they are still friends.
Valuable lesson to learn to apologize at an early age.
Ren
