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.
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