The exemplar projects included below all achieved A* grades overall. Some were created to a different Specification to Cambridge IGCSE and so are slightly different in format / content than what we are asking you to do, however they all contain really good examples of Research; Design work; Development; CAD modelling and assembly. Follow the advice of your teacher and use these as reference.
This student designed a product for removing flies from a home. It achieved an A* grading
This student designed a Baby mobile product for her nephew. It achieved an A* grading. The research section is excellent.
This student, from a farming family, designed a new lamp to go on top of his tractor. The design and development work is very good.
This student designed an Air Purifier for her younger brothers room to remove smoke fumes. It achieved an A* grading. The research section is particularly good.
Note that due to school closure this project was not fully assembled as the student was unable to come into school to complete.
This student designed a bike light