Sure! Here are a few sentences using "ostracize" that a kid might say:
- "I felt really sad when they decided to ostracize me at recess just because I tripped and fell."
- "It's not nice to ostracize someone because they like different things than you do."
- "The group started to ostracize him after he didn't want to play their favorite game."
- "When she made a mistake in class, the other kids seemed to ostracize her instead of helping her feel better."