If you want to do your own project for the Junior Cert or for the Young Scientist this is a good place to start, with a lot of the answers to your questions.
If you want to do your own project it might help to review your recent past and find something that interests you.
Do you play sport, learn music, in the scouts or guides? Do you cook ?
Review your time spent following your interest ... is there anything in these activities that makes you wonder, 'why?'
Set an idea like this as your project, this will further moti
If you need Project Ideas then this page is for you
Some Class Investigations we have tried in previous years