Docs and visa interview for kids

[indian_boy007]

I have applied for Visitor visa (B1/B2) for my family. We are planning to visit my brother-in-law in US, for the duration of about a month. We have submitted our docs to VFS Mumbai couple of weeks ago and have our interview on Jan 28, 2019. 

We have 2 kids (8 years and 1.5 years old). We are not sure if they need to accompany us for the visa interview. We haven't fill any visa waiver form for them. Can someone help us with this question?

Also, there are the docs we are planning to take with us:

1. All current and previous passports
2. Appointment letter
3. Employment verification letter 
4. Last 3 salary slips
5. Bank statement balance (total Rs.6 lac)

Is there any other doc we need to take?

Thanks a lot.