Text in red has been edited since the original posting - watch for changes and clarification.

A.    Objective

1. The objective of this project is to build a three dimensional shape which uses any three of the shapes below ("required shapes"). Note that - for this project - cube and cuboid are regarded as one shape type - not two - so if using a cube, two other shapes must also be used.
2. The three dimensional shape must be a scale replica of a recognizable object, that has been pre-approved by your teacher. Acceptable objects include: 

• Your apartment or house;
• Your family's motor vehicle (car); 
• A household item;
• An item in a photo that is realistically dimensioned.

B.    Specifications

1. Each project must be shaped by hand from cut material (paper, wood, plastic) OR can be made of premade shapes (such as using a Pringles cans, ping pong balls, straws, cereal boxes).  The colored 4mm board that is available from stationery stores is acceptable. Styrofoam is acceptable, provided it is colored to suit the project selected.
2. The project must fit inside a cube less than 60 cm on every edge.
3. The project must match the A4 dimensioned sketch in every way. No changes from the scale drawing are permitted.
4. Measurements (ie. dimensions) of the shapes must scale down to rational numbers that are NOT whole numbers or integers. (This allows for the AREA and VOLUME calculations to be achieveable without being too easy or simplistic).
5. Example photos of previous projects are included on this wiki (website). The aim is to allow students to understand what is required. However, these projects, or derivatives (variations) of these projects may not be attempted. Your teacher will grade your draft sketch and check that your proposed project does not borrow from these examples.
6. Multiples of the shapes may be used - for example two spheres may be required to build your shape - but two other shapes are still required in the design. 
7. You may negotiate with you teacher to make a 'recognizable object' that does not may meet the requirements of Objective 2, above. This must be negotiated with your teacher - prior to commencing your draft A4 sketch.  
8. Late submisions will be eligible for a maximum grade of C+.

For this project, these number definitions will be used:

• Rational number: Any number that can be made by dividing one integer by another. The word comes from "ratio".  A number that has a known decimal place. For example: 3.157, 0.54, 0.125
• Whole number: There is no fractional or decimal part to the number.  For example, 0, 1, 2, 3 etc,
• Integer: whole numbers and their opposites - negative numbers. There is no fractional or decimal part to the number.  For example, -3,-2-1, 0, 1, 2, 3 etc.
• Irrational number: a number that cannot be written as a simple fraction - the decimal goes on forever without repeating. For example, π (Pi),or√2.

REQUIRED SHAPES: (i) Cube or Cuboid (rectangular prism); (ii) triangular prism; (iii) triangular-based pyramid; (iv) square-based pyramid; (v) Cone; (vi) Cylinder; (vii) Sphere or half-sphere. (see image below)

http://www.bbc.co.uk/schools/ks2bitesize/