A toy is an item that is used in play, especially one designed for such use. It is mainly intended for use by children, though may also be marketed to adults under certain circumstances. Playing with toys can be an enjoyable means of training young children for life in society. Different materials like wood, clay, paper, and plastic are used to make toys. Many items are designed to serve as toys, but goods produced for other purposes can also be used. For instance, a small child may fold an ordinary piece of paper into an airplane shape and "fly it". Playing with toys is considered to be important when it comes to growing up and learning about the world around us. Younger children use toys to discover their identity. The subject item is significant as it is an early example or a toy that was designed to fill the need for children to learn cause and effect, explore relationships, and practice skills they will need as adults. Adults also can use toys on occasion to form and strengthen social bonds, teach, help in therapy, and to remember and reinforce lessons from their youth. Wooden box with pieces of wood inside of various sizes believed to be a child's construction toySome pieces have designs

Aluminium honeycombe - internal of helicopter rotor blades (such as Iroquois/Huey)17 depressions or dentsairplanes - design and construction

The indispensable annual pocket guide and source of reference, the Observer's Book of Aircraft, now in its 24th yearly addition.aircraft, airplanes - design and construction

Air traffic controller or aviation enthusiast, fighter pilot or missile battery commander, you need to know how to put a name to the hundreds of civil and military aircraft types that crisscross the world's airspace.airplanes - design and construction, helicopters

The subjects of this book are not the greats, nor the near greats, of aviation history, but the black sheep that have embarrassed their builders.airplanes - design and construction, planes