Playground Playground A playground, playpark, or play area is a place specifically designed to enable children to play there. It is typically outdoors. While a playground is usually designed for children, some target other age groups. Berlin's Preußenpark for example is designed for people aged 70 or higher. A playground might exclude children below a certain age. Modern playgrounds often have recreational equipment such as the seesaw, merry-go-round, swingset, slide, jungle gym, chin-up bars, sandbox, spring rider, trapeze rings, playhouses, and mazes, many of which help children develop physical coordination, strength, and flexibility, as well as providing recreation and enjoyment and
Time synchronization in North America Time synchronization in North America Time synchronization in North America can be achieved with many different methods, some of which require only a telephone, while others require expensive, sensitive, and rare electronic equipment. In the United States, the United States Naval Observatory provides the Standard of Time, called UTC(USNO), for the United States military and the Global Positioning System, while the National Institute of Standards and Technology provides the Standard of Time for civil purposes in the United States, called UTC(NIST). A Standard frequency and time signal service is a station that operates on or immediately adjacent to 2.5 MHz,