I was approached by the folks at Education.com about possibly doing an activity of theirs as a guest post. (I'm not affiliated with them in any way.) It's a kinda cool science experiment to do with your kids and I'm all for that. Enjoy!
With a button, string and a stopwatch, children can see, hear and measure aerodynamics in action! In this energy transfer activity, your child will compare the spin duration of a button strung on different kinds of string. Two key elements of the scientific method are introduced: how to record results of an experiment on a data chart and how to use data to support a conclusion.