Use masking tape to secure stencils (from a craft store) all over your shoes. The theme for the stencils? Mother and child: An apple on one foot, an apple tree on the other. Cover any empty space with masking tape to prevent those areas from being painted, then take the shoes outside and spray paint the stencil areas.

Try some other interesting stencil pairings: a chicken and egg; a flower and a seed; a cradle and a gravestone (yes, morbid we know, but still kind of cool).