Fun with self portraits and photography. Have older kids snap pictures of the younger ones and then snap each other in artistic ways. Or have them do a photo shoot one week of someone that is important to them (mom or dad); using art as a way to honor others. Brainstorm what that may look like
David Hockney - This mural is made up of photographs. Even though the photos don't go together they still look really effective together. As I do photography I could take the photos, put them together and paint them.