Creating hallow plastic products don’t need to be expensive and energy consuming. Students from University of Rochester have created a miniature rotational molding machine that is made of recycled materials and is powered by a cordless drill. Students Andrew Duffy Craig Tyler, and Edward Harrison made this wonderful machine for fun, but is very productive. I just wish that they will use other a more energy efficient substitute for the drill. However, their initiative of using scrap materials is eco-friendly enough. In addition, the finish products are so cute. It invited me of doing the same thing, but I am not mechanically inclined.