My DD is in fourth grade and we have to build a working amusement park ride. It has to be to scale and it has to have moving parts. We have to take pictures of progress and build a schematic for the ride. In addition, they have to put together a flyer for the amusement park, a cost plan, and integrate their ride with other rides in the park which other students build. They also have to each put together a model for either a dry goods store (toys or souveniers or whatnot) or a food stand. We got an e-mail on it today and it is due by 23 May.