What the Twister can do :: City Technology - Engineering for Pre K - 5 kids

The eight moving planes of a twister

The Twister has eight different surfaces, each of which moves in a different direction: * a) & b) are the two pages of the book;

c) & d) are the two sides of the angle-fold on top;
e) & f) are the two sides of the angle-fold on the bottom; and
and g) & h) are the two lalves of the parallelogram bridge.