Hair chalking: dampen the strands you want colored, use pastel colors of chalk and rub on the hair strand. Washes out when you shampoo. Also saw where you can fill a bowl with water, put the chalk in to saturate and use gloves to apply wet chalk to hair.
This is one interesting way to actually show off your thin hair! And this actually will work better on thin hair. Comb back all your hair. Take strands from both sides of hair and twist it back lightly. Do this in multiple pairs. Show off by adding pretty little hair clips.