3D hand fan:
A hand-held fan is an implement used to induce an airflow for the
purpose of cooling or refreshing oneself. Any broad, flat surface
waved back-and-forth will create a small airflow and therefore can
be considered a rudimentary fan.
Lenticular material can be used for a hand fan,with the stereo
pictures on it,it has the advantages for advertising,promotion
industry.The advantage is your customer will bring it home rather
that throw it into rubbish bin as other traditional paper or normal
printing plastic fan.