H1b drpobox elibility(h1 extension+h4 spouse+(h4 of 2 kids 3 yrs first time to usa)

USA H1B Visa
1

Hii,
my h1b visa was stamped in april 2015 and expired in june 2016 and I stayed in USA till nov 2018(maintained valid visa status) and returned to india.now my employer is palnning to send me back to USA for new role/position.my question is

1.since I have usa visa stamped in india twice before and have no denials ,am I eligible for dropbox even though my visa expired 5 yrs back.
2.my spouses visa exiperd in june 2018 and kids of age 3 yrs never travelled to usa .Are they eligible for dropbox.

3.if we are eligible for dropbox should I take my kids along with me n my spouse for dropbox?

4.If we have to attend the in-person interview should I take my kids along with us or me n my wife are enough for the interview.

2

Yes.

https://travel.state.gov/content/travel/en/News/visas-news/important-announcement-on-waivers-of-the-interview-requirement-for-certain-nonimmigrant-visas.html

Yes.

No need, just one of you can drop off tbe documents.

3

Thanks for da quick reply