Most science projects usually need the following:
A project question (problem)
An experiment that contains these parts:
an independent variable
a dependent variable
In order to do a good project it should interest you. After working with students for over 10 years, I recognise it is quite difficult to readily Identify a students interests, answer the following questions, they some times lead to an identification of your fields of interest.
what interests you,
what do you like to do in your free time
what magazines do you read
what are you favourite TV programmes ?
what games do you play
what do you want to be when you grow up
which subjects are you favourite (do you hate the least)
A little work will go a long way, if you have a plan and work to it !