I have to make a project on any topic of science and we are told that only household things are required . Please suggest me a topic and how to make it ?

In case your teacher has given you a specific chapter, it is best that you go through all the things taught in that chapter and make sure you understand all the concepts. Then, look at real life applications of the concepts and you can plan what model you will make related to those.
Incase the teacher has not mentioned the chapter, you can pick the chapter which you find the most interesting and proceed in a similar manner. 
You will surely come up with an innovative project if you make an informed choice in this manner.
Feel free to ask wherever you have any doubts in the study material of the relevant chapter.