if you are looking for a great family-time activity, may I suggest jewelry construction?  Even boys can get into the swing of it if they are encouraged to make some jewelry items that appeal to masculine tastes.  For the girls I would suggest that you find some simple beaded bracelet designs — that will not be too taxing on the patience of little ones — or some simple glue-together pins or brooches. A family hobby such as this can really serve to strengthen — over time — the bonds of closeness between all the members of your family.