Toy designed for older audiences, such as teenagers or adults, demonstrate advanced concepts. Newton's cradle, a desk toy designed by Simon Prebble, demonstrates the conservation of momentum and energy. Not all toys are appropriate for all ages of children. Even some toys which are marketed for a specific age range can even harm the development of children in that range. "Age compression" is a toy industry term that describes the modern trend of children moving through play stages faster than they did in the past. Children have a desire to progress to more complex toys at a faster pace, girls in
An Englishman, an Irishman and a Scotsman cocky, stupid, or naïve, while the home national is smart, practical, or in any case ultimately victorious. The joke need not necessarily involve nationalities. Jokes about the hard sciences may begin "A mathematician, a physicist and an engineer..." An Englishman, an Irishman and a Scotsman "An Englishman, an Irishman and a Scotsman" is the opening line of a category of joke popular in Ireland and the United Kingdom. The nationalities involved may vary, though they are usually restricted to those within Ireland and the UK, and the number of people involved is usually three or sometimes four. In Ireland, the