Google SketchUp (free) is an easy-to-learn 3D modeling program whose few simple tools enable you to
create 3D models of houses, sheds, decks, home additions, woodworking projects – even space
ships. You can add details, textures and glass to your models,and design with dimensional accuracy.
Paper Airplane Flight Simulator
Workman, the publisher of Ken Blackburn’s fantastic paper airplane books, features an online
Shockwave Paper Airplane Flight Simulator where the player can control for angle, thrust and
elevation. You can also download a copy of Ken Blackburn’s world record paper airplane.
Create robot arms and watch how they move.
The Science Explorer
This site features three simple paper aircraft designs for the younger crowd and also offers
detailed explanations about why the objects (plane, blimp and helicopter) fly, fall and spin the way