H.W.
Hi E.,
I am a stay at home mom in Redwood City too. I have a daughter who is 2 1/2 and a 4 month old son. There is a playgroup we are a member of through the Redwood City Mother's Club. Just go online to join (its very cheap and worth it) and then you can go to the playgroup part of the site and find the right age group for you and your sons. The group is a lot of fun, and a great way to meet new people.
Both my husband and I were born and raised here and now we are having the time of our lives of raising our children here.
Take care,
H.