St. Helena Things to Do:
Here is a link that talks about 25 different things to do and see in the beautiful town of St. Helena!
https://vacationidea.com/california/best-things-to-do-in-st-helena.html
Napa Things to Do:
If you want to take the short drive South to Napa then here is a link talking about all the fun things to do, including hot air balloons!
https://www.visitnapavalley.com/things-to-do/
Kid Friendly Things to Do:
https://www.visitnapavalley.com/things-to-do/kid-friendly/
Kid Friendly Wineries:
https://www.visitnapavalley.com/blog/post/kid-friendly-wineries-in-napa-valley/
We highly recommend Castello di Amorosa! It is a BEAUTIFUL castle and they even have grape juice for the kids.
https://www.yelp.com/search?find_desc=Kids+Friendly+Winery&find_loc=St.+Helena%2C+CA+94574
Both #1 and #3 are in the heart of St. Helena with the others not too far away.