These are parts of the body that come in different shapes, colours, sizes and styles:
:curlers: HAIR - colour, shape and style
:eye: EYES - colour and shape
SKIN - colour
BODY - shape and size (see also skin)
:stinkyfeet: FEET - Size
NAILS - length and (sometimes) colour
Get your charges together and compare (and celebrate) all the things that are different about you all.