I hope I am putting this in the right forum spot. I will be a new teacher for 6-12th in a small rural school this fall, and I really would like to welcome students with something that peaks their curiosity and engages them on the first day and/or at the open house. For the open house I am trying to come up with either a demo experiment that is real cool but might not require a lot of input from me to that I can still talk with parents, etc. Or, maybe it is something simple the students can go up to and manipulate safely. Then, on their first day after covering safety basics, students could be involved in a wow experiment to start off that they can later investigate to stimulate inquiry. I have found a lot already, but I need to see where to get and price certain substances, and I am worried about anything to hazardous to start with. Thoughts and ideas are so welcomed!