1. Take a cardboard of size about 300mm x 300mm.
2. Leave 50mm space from all four sides and start building your structure over
it, using Popsicle sticks.
3. Then start building your structure over it (not more than 2 stories).
4. The structure must be a framed structure (i.e., it must contain beams, lintels
etc., having the walls and roof supported on them).
5. Provide proper strength to your structure, as it will be checked under
loading.