Stroller help

STROLLER HELP

Hello! Soon to be third time mom of newborn, 2 year old and 3 year old!

We got rid of our strollers and currently have a two seat wagon. I’m thinking of getting a single stroller travel system for our newborn but want to know what others got taking into account their other young children.

I am due in July so am picturing mainly using the stroller with just the newborn for daytime walks while my other two attend daycare but I don’t want to overlook a better option that may be better for all three kids.

Essentially should I get a double with maybe a board attachment for the back given my kids ages or is a single stroller enough?