I found that when I put the girls to bed is a good time to teach them body parts. It the bath we wash from top to bottom pointing out the body parts. In front of the mirror we brush our teeth and hair. When it it time to tuck them in we get kisses on all the different head parts (nose, cheek, eye, forehead, ear... even eyelashes) and we might even get a kiss on the belly - this all usually ends in a lot of giggles. All in Swedish of course.