Seesaw a "teeter-totter". According to linguist Peter Trudgill, the term originates from the Nordic language word "tittermatorter". A "teeter-totter" may also refer to a two-person swing on a swing seat, on which two children sit facing each other and the teeter-totter swings back and forth in a pendulum motion. Both "teeter-totter" (from "teeter", as in "to teeter on the edge") and "seesaw" (from the verb "saw") demonstrate the linguistic process called reduplication, where a word or syllable is doubled, often with a different vowel. Reduplication is typical of words that indicate repeated activity, such as riding up and down on a
Playground all the individuals who have been certified to inspector playgrounds within Australia. European Standards EN 1177 specifies the requirements for surfaces used in playgrounds. For each material type and height of equipment it specifies a minimum depth of material required. EN 1176 covers playground equipment standards. In the UK, playground inspectors can sit the examinations of the Register of Play Inspectors International at the three required levels - routine, operational and annual. Annual inspectors are able to undertake the post-installation inspections recommended by EN 1176. Because the majority of playground injuries are due to falls from equipment, injury prevention efforts