Let your kids create their own town. Some ideas include:
*Let them draw and cut out their roads. You can even use paint tape.
*Convert cereal boxes or oatmeal tubes into houses
*Let them build a bridge from household items.
*They can build towers from books, blocks, etc.
*Let them construct their own car.
*Let them create animals from Playdough.
The sky is the limit. This is a great exercise in how to be resourceful and turn household objects into something new.