All I know is that I don’t want to create a paper maché volcano
I want to help my daughter do a science fair project and create a fancy 3-fold poster for her elementary school’s science fair next month. I like the idea of making oobleck (a.k.a. “slime”) with cornstarch and water and doing some simple experiments with it. I think it would be a lot of fun. I wonder if it is too basic for fourth grade, but I expect it would be OK. I think that learning the format of creating an experiment and presenting it in poster form is a lot more important than the impressiveness of the experiment.