What is a good way of getting an entire class involved?

In school, we have to present a seminar about phytoremediation (removal of toxins, etc. from soil with the use of plants) and one of the requirements is getting the class involved with your seminar. I'm not too fond of creating a game (no jeopardy, or anything related) where you just ask questions about the seminar topic, so I was looking for some other ideas.



Any suggestions are welcome!

ThanksWhat is a good way of getting an entire class involved?
Okay, well, you could try a hands on method. Like bring in a plant and have something represent the toxins, the thingy that removes the toxins (I'm obviously in my element with my usage of technical terms). You could have certain people act it out. That usually becomes funny somehow. Hope it helps!What is a good way of getting an entire class involved?
Doing an experiment works good, giving them something tangible to see and perhaps participate in. Perhaps lead them along, and then have them make conclusions, though correct them if they're wrong, much like teachers usually do: expect you to try, not just spoon feed the information to the students.What is a good way of getting an entire class involved?
Have a Q+A session at the end and give prizes to people who participate (a piece of candy). That usually works.