simple machines examples
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A Type 1 Lever is where the pivot (fulcrum) is between the effort and the load. In an off-center type one lever (like a pliers), the load is larger than the effort, but is moved through a smaller distance. i.e. a hammer\nA Type 2 Lever is where the load is between the pivot (fulcrum) and the effort. i.e. a wheelbarrow\nA Type 3 Lever is where the effort is between the pivot (fulcrum) and the load. i.e. tweezers
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See a magic square in\nhttp://en.wikipedia.org/wiki/Magic_square
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Computer.  It is interactive.
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It seems research on this has continued. Still sounds very preliminary though - experiments on small models or paper planes ;)  But maybe you'd like to check the links.
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A knife cutting a cake, is an example of a wedge.\nA seesaw is an example of a lever.\nA light bulb is a example, of a watt ?--- Get it, a watt, oh forget it.
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Simple....experimental
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Steve Gibson has some great examples and utilities.\nhttp://www.grc.com/smgassembly.htm
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First link has instructions and illustration.\n\nSecond link has written instructions.
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try this site http://www.howstuffworks.com
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Oh wow, you could get a million examples of that. A compund machine is anything that ISN'T a simple machine. So if it isn't a wedge, lever, pulley, inclined plane, of other simple machine then it is a compound machine. They are a combination of multiple simple machines.\nTo actually answer your question though, a gear system and a car engine
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Here's a link to one: http://www.easylinkuk.co.uk/page4.html
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http://www.bd.com/ds/productCenter/254102.asp\nhttp://www.bact.wisc.edu/Microtextbook/index.php?module=Book&func=displayarticle&art_id=119\nwww.rlc.dcccd.edu/mathsci/ reynolds/micro/lab_manual/API.html
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http://www.discovercircuits.com/list.htm
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Please visit http://computer.howstuffworks.com/search-engine.htm
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<www.howstuffworks.com>\n<en/wikipedia,org/wiki/Main_page>
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go to www.howstuffworks.com
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try this link\nhttp://www.invent.org/hall_of_fame/106.html