Covid positive 6 year old

Ka

I’ve had Covid twice myself and neither one of my kids ever showed symptoms so I never tested them. However my daughter woke up today feeling sick so I tested her because she had a bad headache came back positive instantly, I have quarantined her in her room behind a baby gate in the hall in hopes my one year old doesn’t get it 🙄 I guess my question is how did everyone’s 6 year old do with Covid? And how long did symptoms last?