To make a 3-D object, you start with a model. A model is made on a computer. It shows what the object will look like. The computer tells the printer how to make it.
Photo Credit: FrameStockFootages/Shutterstock/
In the Know
How New York’s Central Park Reuses Trees
National Love a Tree Day is May 16. It is … read more
In the Know
Animals in Winter
Some animals cannot survive in cold weather. Butterflies migrate. They … read more
In the Know
Your Shadow and the Sun
As the day gets closer to noon, the Sun is high … read more