Castor oil is pure magic - if you want longer and thicker eyelashes or hair. No need to buy expensive "wonder" treatments. It´s mostly chemicals in those anyways, or it´s castor oil and perfume.
To get longer eyelashes: add castor oil on a cotton swab and strike it on the roots of the eyelashes, and I usually put oil on my lashes too. Do this before you go to bed.
To get longer and thicker hair: take some castor oil in your hands and massage your hair and skull. Continue doing it for 5 min, cover your hair with a towel and leave it in for an hour. To wash it off you need to put schampo in DRY hair, the castor oil is so thick, not at all like other oils. Dry hair, schampo, rinse and wash it one more time.
It really helps, and you not only get thicker hair, but also more shiny hair.