This acitvity is ??

That may be Hazel in the center. If that's Bob to the left, he sure is a lot shorter than Hazel. He's the eldest of the four siblings, isn't he?

I have no idea who the girl on the right might be. And I have no idea what they're doing. All three seem to have sticks (or wooden spoons?) in their hands and are doing something in that wooden box.

Grandpa listed this as "Washington Street", but I can't place where this would be at 234.