Product Description: "...extremely good problems...covers a very wide portion of the puzzle spectrum."--from puzz.com. Physical exercise strengthens your body--and deciphering these puzzles helps train your brain and keep you "mentally fit"! Improve your intellectual flexibility and ability to problem-solve in all facets of life with 90 conundrums that include word and math puzzles, visual dilemmas, codes to crack, patterns and series to complete, analytical reasoning tests, probabilities, and more...read more (view table of contents, read Amazon.com's description)

Shows how to make a variety of paper airplanes, including darts, long-distance flyers, experimental designs, and unusual gliders

Easy-to-understand diagrams and detailed instructions demonstrate how to create action toys--such as a flipper and a wind spinner--using paper and cartons

Presents simple instructions for making holiday decorations and projects out of paper.

A collection of thirty-five magic tricks using folded paper, including optical illusions and some simple toys

Explains the basic principles of flight and gives folding instructions for twenty-nine airplanes

Shows how to make a variety of paper toys, including party hats, puppets, flowers, and decorative chains

Introduces scientific principles through toys made of paper, cardboard, and household items

Shows how to fashion more than thirty tumbling, jumping, rattling toys--from milk carton boats to paper poppers--out of household materials, each in one minute or less

Easy directions for building a paper town, buildings, bridges, boats, and other projects

Presents more than sixty optical illusions that include tricks, drawings, and toys that can be assembled

Presents more than sixty optical illusions that include tricks, drawings, and toys that can be assembled.