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Hula-hoop
A hula hoop is a toy hoop that is twirled around the waist, limbs or neck. It can also be wheeled along the ground like a wheel, with careful execution. They have been used by children and adults since at least 500 BC. The modern hula hoop was inspired by Australian bamboo hoops. Common lore posits the creators of the plastic hoop popularised in the US witnessed Australian children playing with bamboo hoops while driving past in an automobile. The new plastic version was popularized in 1958 by the Wham-O toy company and became a fad. Hula hoops for children generally measure approximately in diameter, while those for adults measure around . Traditional materials for hoops include willow, rattan (a flexible and strong vine), grapevines and stiff grasses. Commercial hoops are usually made of plastic tubing. Origins Native American Hoop Dance is a form of storytelling dance incorporating hoops as props. These props are used to create both static and dynamic shapes, which re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hula Hooping
A hula hoop is a toy hoop that is twirled around the waist, limbs or neck. It can also be wheeled along the ground like a wheel, with careful execution. They have been used by children and adults since at least 500 BC. The modern hula hoop was inspired by Australian bamboo hoops. Common lore posits the creators of the plastic hoop popularised in the US witnessed Australian children playing with bamboo hoops while driving past in an automobile. The new plastic version was popularized in 1958 by the Wham-O toy company and became a fad. Hula hoops for children generally measure approximately in diameter, while those for adults measure around . Traditional materials for hoops include willow, rattan (a flexible and strong vine), grapevines and stiff grasses. Commercial hoops are usually made of plastic tubing. Origins Native American Hoop Dance is a form of storytelling dance incorporating hoops as props. These props are used to create both static and dynamic shapes, which rep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gentlemen's Agreement
A gentlemen's agreement, or gentleman's agreement, is an informal and legally non-binding agreement between two or more parties. It is typically oral, but it may be written or simply understood as part of an unspoken agreement by convention or through mutually-beneficial etiquette. The essence of a gentlemen's agreement is that it relies upon the honor of the parties for its fulfillment, rather than being in any way enforceable. It is distinct from a legal agreement or contract. History The phrase appears in the British parliamentary records in 1821 and in the Massachusetts public records in 1835. The ''Oxford English Dictionary'' cites P. G. Wodehouse's 1929 story collection ''Mr Mulliner Speaking'' as the first appearance of the term. Industry A gentleman's agreement, defined in the early 20th century as "an agreement between gentlemen looking toward the control of prices," was reported by one source to be the loosest form of a "pool." Such agreements have been reported to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kevlar
Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires. It is typically spun into ropes or fabric sheets that can be used as such, or as an ingredient in composite material components. Kevlar has many applications, ranging from bicycle tires and racing sails to bulletproof vests, all due to its high tensile strength-to-weight ratio; by this measure it is five times stronger than steel. It is also used to make modern marching drumheads that withstand high impact; and for mooring lines and other underwater applications. A similar fiber called Twaron with the same chemical structure was developed by Akzo in the 1970s; commercial production started in 1986, and Twaron is now manufactured by Teijin. History Poly-paraphenylene terephthalamide (K2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaffer Tape
Gaffer tape (also known as gaffer's tape, gaff tape or gaffa tape as well as spike tape for narrow, colored gaffer tape) is a heavy cotton cloth pressure-sensitive tape with strong adhesive and tensile properties. It is widely used in theatre, photography, film, radio and television production, and industrial staging work. While sometimes confused with duct tape, gaffer tape differs in the composition of both the backing, which is made from fabric as opposed to vinyl or other plastics, and the adhesive, which is more resistant to heat and more easily removed without damaging the surface to which it adhered. History The precise origin of the name is unknown, one theory being that it is named for the gaffer (chief lighting technician) on a film crew. When cables are taped down on a stage or other surface, either to prevent tripping hazards or conceal them from view of the audience or camera, they are said to be ''gaffed'' or ''gaffered''. Gaffer tape was invented in 1959 by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyethylene
Polyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly(methylene)) is the most commonly produced plastic. It is a polymer, primarily used for packaging ( plastic bags, plastic films, geomembranes and containers including bottles, etc.). , over 100 million tonnes of polyethylene resins are being produced annually, accounting for 34% of the total plastics market. Many kinds of polyethylene are known, with most having the chemical formula (C2H4)''n''. PE is usually a mixture of similar polymers of ethylene, with various values of ''n''. It can be ''low-density'' or ''high-density'': low-density polyethylene is extruded using high pressure () and high temperature (), while high-density polyethylene is extruded using low pressure () and low temperature (). Polyethylene is usually thermoplastic, but it can be modified to become thermosetting instead, for example, in cross-linked polyethylene. History Polyethylene was first synthesized by the German chemist Hans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polypropylene
Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar. Its properties are similar to polyethylene, but it is slightly harder and more heat-resistant. It is a white, mechanically rugged material and has a high chemical resistance. Bio-PP is the bio-based counterpart of polypropylene (PP). Polypropylene is the second-most widely produced commodity plastic (after polyethylene). In 2019, the global market for polypropylene was worth $126.03 billion. Revenues are expected to exceed US$145 billion by 2019. The sales of this material are forecast to grow at a rate of 5.8% per year until 2021. History Phillips Petroleum chemists J. Paul Hogan and Robert Banks first demonstrated the polymerization of propylene in 1951. The stereoselective polymerization t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fire Gypsy Performing With A Fire Hula Hoop
Fire is the rapid oxidation Redox (reduction–oxidation, , ) is a type of chemical reaction in which the oxidation states of substrate change. Oxidation is the loss of electrons or an increase in the oxidation state, while reduction is the gain of electrons or a ... of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products. At a certain point in the combustion reaction, called the ignition point, flames are produced. The ''flame'' is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce Plasma (physics), plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's Intensity (heat transfer), intensity will be different. Fire in its most common form can result in conflagration, which has the potential to cause physical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rochester, New York
Rochester () is a City (New York), city in the U.S. state of New York (state), New York, the county seat, seat of Monroe County, New York, Monroe County, and the fourth-most populous in the state after New York City, Buffalo, New York, Buffalo, and Yonkers, New York, Yonkers, with a population of 211,328 at the 2020 United States census. Located in Western New York, the city of Rochester forms the core of a larger Rochester metropolitan area, New York, metropolitan area with a population of 1 million people, across six counties. The city was one of the United States' first boomtowns, initially due to the fertile Genesee River Valley, which gave rise to numerous flour mills, and then as a manufacturing center, which spurred further rapid population growth. Rochester rose to prominence as the birthplace and home of some of America's most iconic companies, in particular Eastman Kodak, Xerox, and Bausch & Lomb (along with Wegmans, Gannett, Paychex, Western Union, French's, Cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Strong
The Strong is an interactive, collections-based educational institution in Rochester, New York, United States, devoted to the study and exploration of play. It carries out this mission through six programmatic arms called "Play Partners": * National Toy Hall of Fame * World Video Game Hall of Fame * International Center for the History of Electronic Games * The Brian Sutton-Smith Library and Archives of Play * ''American Journal of Play'' * The Woodbury School It also houses The Strong National Museum of Play, the National Museum of Play. Independent and not-for-profit, The Strong houses hundreds of thousands of historical materials related to Play (activity), play. These enable a multifaceted array of research, exhibition, and other interpretive activities that serve a diverse audience of adults, families, children, students, teachers, scholars, collectors, and others around the globe. History The Strong was founded by Margaret Woodbury Strong in 1968 as the "Margaret Woodbur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Toy Hall Of Fame
The National Toy Hall of Fame is a U.S. hall of fame that recognizes the contributions of toys and games that have sustained their popularity for many years. Criteria for induction include: icon status (the toy is widely recognized, respected, and remembered); longevity (more than a passing fad); discovery (fosters learning, creativity, or discovery); and innovation (profoundly changed play or toy design). Established in 1998 under the direction of Ed Sobey, it was originally housed at A. C. Gilbert's Discovery Village in Salem, Oregon, United States, but was moved to the Strong National Museum of Play (now The Strong) in Rochester, New York, in 2002 after it outgrew its original home. Seventy-eight toys have been enshrined in the National Toy Hall of Fame: Original inductees (1998-99) 2000s Class of 2000 Class of 2001 Class of 2002 Class of 2003 Class of 2004 Class of 2005 Class of 2006 Class of 2007 Class of 2008 The following toys were added in 2008: # ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
