Want to do your part to advance science but don't have access to a supercollider or DNA sequencer? Have I got the website for you. Check out Scistarter.
Researchers create an account specifying exactly what sort of help they'd like. This can range from taking pictures of local flora to solving puzzles online and everything in between. The tasks are divided up by topic (insects, health, chemistry, etc.) and by location (things you can do at home, things you can do in the car...). Then volunteers of all ages simply sign up for the job they find most interesting.
There's definitely something for everyone.