LOL, if you really do have a boy in there you can raid my stash. Otherwise, the local twin sales are always great and most of them have them twice a year (fall & spring). I've checked out Small Fry Shoppe in Danville---cute stuff.
The one I LOVE is They Grow so Fast in Lafayette, lots of Gymboree, Crazy 8, Jack and Jill. My second go to is Wee Change/Things (not sure which) in WC and then in Concord there is Growing Pains (by far the cheapest place).
Re: Favorite kids consignment shop East Bay area?